Paint, Coatings & Antifouling

OVERVIEW

Paint and coating work on a yacht is not simply a cosmetic activity. Coating systems protect steel, aluminium and other substrates from corrosion, weather, seawater, chemicals and mechanical damage while also providing the required final appearance.

The Project Manager does not determine the coating chemistry or tell the applicator how to spray. The PM should ensure that the approved coating specification is understood, environmental limits are controlled, surface preparation is accepted, application requirements are respected and inspection records demonstrate that the completed system meets the agreed standard.

A coating failure discovered after launch can result in significant warranty cost, programme disruption and reputational damage. Good coating control therefore begins before surface preparation and continues through final inspection and immersion.

KEY RESPONSIBILITIES

• Obtain the approved paint and coating specification

• Confirm the substrate and existing coating condition

• Establish which areas require complete removal, local repair or overcoating

• Confirm product compatibility before application

• Review manufacturer's technical data sheets

• Confirm required surface-preparation standard

• Coordinate masking and protection of adjacent equipment

• Monitor environmental conditions during preparation and application

• Confirm substrate temperature, ambient temperature, relative humidity and dew point where required

• Confirm surface cleanliness before coating begins

• Verify mixing ratios and induction requirements where applicable

• Monitor product pot life

• Confirm required wet-film and dry-film thickness

• Control minimum and maximum overcoating intervals

• Coordinate stripe coating on edges, welds and difficult areas where specified

• Maintain product batch and application traceability

• Identify coating defects before subsequent coats conceal them

• Coordinate inspection and repair of defects

• Confirm curing requirements before handling, launching or returning equipment to service

• Maintain coating inspection and completion records

SURFACE PREPARATION — THE FOUNDATION OF THE COATING SYSTEM

A high-quality paint product cannot compensate for poor surface preparation.

Before coating begins, the substrate should meet the preparation standard specified for the particular coating system.

Depending on the work, preparation may include:

• freshwater washing

• degreasing

• pressure washing

• removal of marine growth

• removal of loose or failed coating

• abrasive blasting

• mechanical preparation

• feathering of existing coating edges

• removal of welding contamination

• removal of sharp edges and weld spatter

• dust removal

• soluble-salt testing where specified

• surface-profile measurement where specified

The prepared surface should be inspected before the first coating is applied.

If corrosion, contamination, moisture or unsuitable existing coating remains beneath the new system, the finished paint may initially appear satisfactory while the failure mechanism remains underneath.

ENVIRONMENTAL CONDITIONS

Temperature and humidity control are fundamental to successful yacht coating work.

Before and during application, the coating contractor should confirm that conditions remain within the limits specified by the coating manufacturer.

The Project Manager should understand the importance of:

• ambient temperature

• substrate temperature

• relative humidity

• dew-point temperature

• ventilation

• condensation risk

• wind and overspray control

• rain or water contamination

Dew Point

A surface can appear dry while still being too close to the dew point for satisfactory coating application.

If condensation forms on the substrate before or during application, adhesion and coating performance can be compromised.

Environmental readings should therefore be recorded at the frequency required by the coating specification rather than relying only on visual judgement.

COATING SYSTEM BUILD-UP

A yacht coating system is normally made up of several compatible layers, each performing a different function.

The exact sequence depends on the substrate, location, manufacturer and approved specification, but a typical exterior system may include:

• prepared steel or aluminium substrate

• corrosion-protection primer

• local filling and fairing compound

• high-build or intermediate coating

• additional fairing and sanding where required

• finishing primer or undercoat

• topcoat system

The Project Manager should ensure that products are being used as part of an approved compatible system rather than allowing individual products to be substituted because they appear similar.

Primer

The primer provides the initial protective bond between the prepared substrate and the subsequent coating system.

Application should follow the specified surface-preparation standard and should take place before the prepared surface deteriorates or becomes contaminated.

Fairing

Fairing compounds are used to achieve the required hull or superstructure profile and surface finish.

Fairing should not be used to conceal unacceptable corrosion, defective welding or structural irregularities that require technical correction.

The PM should ensure that structural acceptance takes place before cosmetic fairing makes the underlying area inaccessible.

High-Build & Intermediate Coats

High-build coatings provide additional film thickness, protection and a suitable base for later finishing stages.

The number of coats and required thickness should follow the approved coating specification rather than being judged solely by appearance.

Undercoat & Topcoat

The finishing system provides the final colour, gloss and environmental protection.

On high-quality yacht finishes, final appearance depends heavily on the quality of the earlier preparation, fairing and undercoat stages.

FAIRING & SURFACE PROFILE CONTROL

Fairing is the process of correcting and refining the surface profile so that the hull, deck or superstructure achieves the required shape and visual finish before the final coating system is applied.

On a high-quality yacht finish, the final topcoat will reproduce rather than hide defects in the surface beneath it. Poor fairness, sanding marks, edges and local depressions can therefore remain visible even when the final paint application itself is technically satisfactory.

The Project Manager should ensure that structural repairs, welding and technical acceptance are complete before fairing compounds conceal the underlying structure.

Purpose of Fairing

Fairing may be required to:

• restore hull or superstructure profile following structural repair

• smooth transitions between new and existing plating

• correct minor surface irregularities

• refine welded areas after technical acceptance

• create a continuous visual surface

• prepare the substrate for high-quality finishing coats

Fairing Is Not a Structural Repair

Fairing compound should not be used to compensate for unacceptable plate alignment, excessive structural distortion, defective welding or unresolved corrosion.

If a newly installed plate is significantly unfair, the cause should be assessed before large quantities of filler are applied.

The Project Manager should distinguish between:

• acceptable cosmetic fairing

• structural unfairness requiring technical correction

• coating repair

• corrosion or substrate defects requiring further investigation

FAIRING APPLICATION SEQUENCE

The exact fairing process depends on the approved paint system, substrate and required finish, but a typical sequence may include:

• structural work completed and accepted

• substrate prepared

• corrosion-protection primer applied where specified

• initial fairing compound applied

• profile checked using battens, straightedges or other approved methods

• controlled sanding

• additional fairing applied where required

• progressive refinement of the surface

• finishing fairing compound where specified

• final sanding

• inspection of fairness

• high-build or finishing primer applied

• guide coat and further surface preparation where required

• final acceptance before topcoat preparation

CHECKING FAIRNESS

Fairness should be assessed over an appropriate area rather than concentrating only on individual repaired spots.

Depending on the surface and specification, assessment may include:

• long fairing battens

• straightedges

• profile templates

• controlled lighting

• guide coats

• visual inspection along the surface

• comparison with surrounding undisturbed areas

Lighting

Lighting is particularly important when assessing high-quality yacht surfaces.

Low-angle or raking light can reveal waves, sanding marks, edges and local depressions that are difficult to see under flat workshop lighting.

The PM should ensure that fairness is inspected under conditions capable of revealing defects before the final finishing system is applied.

FAIRING THICKNESS & WEIGHT

Excessive fairing compound should not be regarded as a normal solution to poor structural alignment.

Large quantities of filler add weight, increase material and labour cost, extend sanding time and can increase the consequences of future coating damage.

Where unusually deep fairing is required, the Project Manager should question why it is necessary and establish whether the underlying structure or repair should first be corrected.

The approved coating or fairing specification may also establish maximum permitted application thickness per coat or total system thickness.

COMMON FAIRING DEFECTS

The Project Manager should look for:

• pinholes

• air pockets

• cracking

• poor adhesion

• shrinkage

• sanding-through

• visible edges between repairs

• local hollows

• high spots

• excessive filler thickness

• contamination between layers

• incomplete curing before sanding or overcoating

Defects should be corrected before the next coating stage rather than relying on later primer or topcoat to hide them.

STRIPE COATS, WFT & DFT

Stripe Coating

Edges, welds, corners, cut-outs and difficult geometries are often more difficult to coat effectively by normal spray application.

Where specified, a stripe coat is applied to these areas to improve coating coverage before or between full coats.

Typical stripe-coat areas may include:

• weld seams

• plate edges

• sharp corners

• brackets

• stiffeners

• drain openings

• difficult recesses

• areas around fittings and penetrations

The Project Manager should verify that stripe-coat requirements within the specification are not omitted simply to save programme time.

WFT — Wet Film Thickness

Wet Film Thickness can be measured during application and provides the applicator with an immediate indication of whether sufficient coating is being deposited.

WFT can help identify under-application before the coating cures.

DFT — Dry Film Thickness

Dry Film Thickness is measured after the coating has cured sufficiently for inspection.

The specified DFT should normally be achieved within the manufacturer's and coating specification's permitted limits.

Insufficient DFT can reduce corrosion protection and coating life, while excessive coating thickness can also create problems depending on the product and application.

The PM should therefore avoid assuming that 'more paint' automatically means better protection.

OVERCOATING INTERVALS & CURING

Every coating product has defined time requirements between application stages.

The Project Manager should understand both:

• the minimum overcoating interval

• the maximum overcoating interval

Minimum Overcoating Time

Applying the next coat too early can trap solvents, disturb the previous coating or interfere with curing.

Maximum Overcoating Time

Waiting too long can result in insufficient chemical adhesion between coats.

Where the maximum interval is exceeded, additional preparation such as abrasion or another manufacturer-approved treatment may be required before application continues.

Curing

Dry-to-touch, ready for handling, ready for overcoating and fully cured are not necessarily the same condition.

The PM should therefore use the manufacturer's technical requirements rather than assuming that a coating is ready simply because the surface feels dry.

COMMON COATING DEFECTS

Coating defects should be identified and investigated rather than simply covered by another coat.

Typical defects may include:

• blistering

• peeling or delamination

• cracking

• pinholing

• solvent entrapment

• runs and sags

• orange peel

• dry spray

• overspray

• contamination

• poor adhesion

• rust breakthrough

• under-film corrosion

• excessive or insufficient film thickness

• colour or gloss inconsistency

Do Not Simply Paint Over the Defect

Where a defect is significant, the underlying cause should be understood before repair.

Possible causes may include:

• inadequate surface preparation

• salt contamination

• moisture or condensation

• unsuitable environmental conditions

• incorrect mixing

• excessive film thickness

• insufficient film thickness

• incorrect thinner

• poor spray technique

• exceeded pot life

• incorrect overcoating interval

• incompatible coating products

Repeated coating failure should trigger investigation of the underlying cause rather than repeated cosmetic repair.

TYPICAL COATING SYSTEM SEQUENCE

A yacht coating system is normally built up in controlled layers. Each layer performs a particular function and depends on the previous layer being correctly prepared, applied and cured.

The exact system varies according to the substrate, location and coating manufacturer's approved specification, but a typical sequence may include:

• substrate preparation

• corrosion-protection primer

• local filling or fairing

• high-build or intermediate coating

• additional fairing and sanding where required

• undercoat or finishing primer

• final topcoat

Primer

The primer establishes adhesion to the prepared substrate and provides the first stage of corrosion protection.

The primer should be applied within the permitted time after surface preparation so that flash rusting, oxidation or contamination does not compromise the prepared surface.

Fairing

Fairing compounds may be used to achieve the required surface profile and visual fairness, particularly on yacht topsides and superstructures where the final finish standard is extremely high.

Fairing should not be used simply to hide unacceptable structural workmanship or uncontrolled distortion.

The structural surface should first be technically acceptable before cosmetic fairing begins.

High-Build & Intermediate Coats

High-build coatings help establish the required protective film thickness and provide a suitable surface for subsequent finishing operations.

Depending on the specification, several coats may be required to achieve the required total dry-film thickness.

Undercoat & Finishing Primer

The finishing primer or undercoat provides the final prepared surface before topcoat application.

At this stage, surface condition, sanding quality, cleanliness and fairness become particularly important because defects can remain visible through the final finish.

Topcoat

The topcoat provides the final appearance and environmental protection.

On high-quality yacht finishes, variations in application technique, temperature, contamination, overspray or surface preparation may remain clearly visible after curing.

STRIPE COATING

Edges, welds, corners, cut-outs and difficult geometries are areas where spray-applied coatings can naturally produce a thinner film.

Where specified, these areas receive an additional stripe coat before or between the main coating layers.

Typical stripe-coat areas may include:

• weld seams

• plate edges

• brackets

• stiffeners

• corners

• drain openings

• cut-outs

• difficult recesses

• fastener areas

The Project Manager should confirm that stripe coating has been carried out where required before the next full coat conceals the area.

WET-FILM & DRY-FILM THICKNESS

WFT — Wet-Film Thickness

Wet-film thickness can be checked during application and provides an immediate indication of whether sufficient coating is being deposited.

This allows the applicator to correct technique or coverage before the coating has cured.

DFT — Dry-Film Thickness

Dry-film thickness is measured after the coating has cured sufficiently for inspection.

The DFT should comply with the approved coating specification and manufacturer's requirements.

Insufficient thickness may reduce corrosion protection or service life, while excessive thickness can also create problems depending on the coating system.

The Project Manager should ensure that DFT records are traceable to the relevant area and coating stage.

OVERCOATING WINDOWS

Each coating product has a permitted interval within which the next coat should be applied.

The Project Manager should monitor both the minimum and maximum overcoating times.

Minimum Overcoating Time

Applying the next coat too early may trap solvents, disturb the underlying coating or prevent proper curing.

Maximum Overcoating Time

If the maximum interval is exceeded, the surface may require additional preparation before the next coat can achieve satisfactory adhesion.

This can include cleaning, abrasion or another treatment specified by the coating manufacturer.

The overcoating window should therefore form part of the project programme rather than being left entirely to the paint contractor.

COMMON COATING FAILURES

Many paint failures that appear after completion begin during preparation or application.

The Project Manager should understand the common warning signs and ensure that defects are investigated rather than simply covered with another coat.

Typical Defects

• blistering

• peeling or delamination

• poor adhesion

• cracking

• pinholing

• solvent entrapment

• sagging or runs

• dry spray

• overspray

• orange peel

• contamination

• rust breakthrough

• premature corrosion around edges and welds

• visible sanding marks

• colour or gloss variation

Typical Root Causes

• poor surface preparation

• contamination

• soluble salts remaining on the substrate

• coating applied too close to the dew point

• excessive humidity

• incorrect mixing ratio

• expired pot life

• insufficient film thickness

• excessive film thickness

• incorrect overcoating interval

• incompatible coating products

• poor ventilation

• insufficient curing

• contamination between coats

Where a repeated or widespread coating defect develops, the PM should investigate the underlying cause rather than authorising repeated local cosmetic repairs.

UNDERWATER COATINGS & ANTIFOULING

The underwater coating system protects the hull from corrosion and controls marine growth while the yacht remains in service.

The system should be selected according to the hull material, existing coating system, vessel operating profile, expected fouling conditions, speed, periods alongside and the planned interval between dry-dock periods.

The Project Manager should ensure that the complete underwater coating specification is understood before work begins rather than treating antifouling as a final paint coat applied immediately before launch.

Typical Underwater Coating Sequence

Depending on the condition of the existing system, a typical sequence may include:

• pressure washing immediately after docking

• removal of marine growth

• inspection of the existing coating system

• identification of damaged or failed areas

• hull survey and NDT where required

• structural and underwater repairs

• surface preparation

• corrosion-protection primer

• intermediate or tie coat where required

• antifouling or foul-release coating

• completion of block-contact areas

• final inspection

• required curing period

• immersion within the permitted launch window

CONVENTIONAL ANTIFOULING SYSTEMS

Conventional antifouling systems generally control marine growth through active ingredients incorporated into the coating.

The exact chemistry and release mechanism depend on the particular product and should be understood from the manufacturer's technical specification.

The Project Manager should not assume that two antifouling products can be substituted simply because they have a similar appearance or intended use.

Selection Considerations

The coating specification should consider:

• yacht operating area

• water temperature

• fouling pressure

• vessel speed

• frequency of movement

• periods alongside

• periods at anchor

• compatibility with the existing coating system

• expected service life

• planned dry-dock interval

• local environmental restrictions where applicable

SILICONE FOUL-RELEASE SYSTEMS

Silicone foul-release coatings work differently from conventional biocidal antifouling.

The silicone surface is designed to provide very low surface energy, making it difficult for marine organisms to establish strong adhesion.

When the yacht moves through the water at sufficient speed, water flow across the hull can assist in releasing accumulated fouling.

Operating Profile Matters

A silicone system may be particularly attractive for yachts that operate regularly and spend significant time underway.

However, a yacht that remains stationary for long periods in warm, high-fouling waters can experience a different fouling profile from a yacht that moves frequently.

The Project Manager should therefore consider actual yacht operation rather than selecting the system purely on theoretical coating life.

EXAMPLE — MEDITERRANEAN & CARIBBEAN SEASONS

A yacht operating a Mediterranean summer season followed by a Caribbean winter season may remain in warm water for much of the year.

This operating profile can expose the underwater hull to significant fouling pressure and should be considered when selecting the coating system.

The Project Manager should review:

• expected Mediterranean cruising programme

• Atlantic crossing

• Caribbean operating period

• average vessel speed

• frequency of movement

• extended marina periods

• periods at anchor

• underwater cleaning strategy

• coating manufacturer's operating recommendations

• expected time before the next haul-out

For an actively cruising yacht, a silicone foul-release system may offer advantages. For a yacht remaining stationary for extended periods, the operating profile should be reviewed carefully with the coating manufacturer before the system is selected.

CONVENTIONAL ANTIFOULING SYSTEMS

Conventional antifouling systems generally control marine growth through active ingredients incorporated into the coating.

The exact chemistry and release mechanism depend on the particular product and should be understood from the manufacturer's technical specification.

The Project Manager should not assume that two antifouling products can be substituted simply because they have a similar appearance or intended use.

Selection Considerations

The coating specification should consider:

• yacht operating area

• water temperature

• fouling pressure

• vessel speed

• frequency of movement

• periods alongside

• periods at anchor

• compatibility with the existing coating system

• expected service life

• planned dry-dock interval

• local environmental restrictions where applicable

SILICONE FOUL-RELEASE SYSTEMS

Silicone foul-release coatings work differently from conventional biocidal antifouling.

The silicone surface is designed to provide very low surface energy, making it difficult for marine organisms to establish strong adhesion.

When the yacht moves through the water at sufficient speed, water flow across the hull can assist in releasing accumulated fouling.

Operating Profile Matters

A silicone system may be particularly attractive for yachts that operate regularly and spend significant time underway.

However, a yacht that remains stationary for long periods in warm, high-fouling waters can experience a different fouling profile from a yacht that moves frequently.

The Project Manager should therefore consider actual yacht operation rather than selecting the system purely on theoretical coating life.

EXAMPLE — MEDITERRANEAN & CARIBBEAN SEASONS

A yacht operating a Mediterranean summer season followed by a Caribbean winter season may remain in warm water for much of the year.

This operating profile can expose the underwater hull to significant fouling pressure and should be considered when selecting the coating system.

The Project Manager should review:

• expected Mediterranean cruising programme

• Atlantic crossing

• Caribbean operating period

• average vessel speed

• frequency of movement

• extended marina periods

• periods at anchor

• underwater cleaning strategy

• coating manufacturer's operating recommendations

• expected time before the next haul-out

For an actively cruising yacht, a silicone foul-release system may offer advantages. For a yacht remaining stationary for extended periods, the operating profile should be reviewed carefully with the coating manufacturer before the system is selected.

FINAL ANTIFOULING APPLICATION & LAUNCH TIMING

Final antifouling application is normally programmed towards the end of the dry-dock period and coordinated closely with the planned launch date.

In practical yacht-refit programmes, final antifouling coats are often applied within approximately the final three to five days before the yacht returns to the water.

However, this should not be treated as a universal fixed rule.

The actual minimum curing time and maximum permitted interval before immersion should always be confirmed from the manufacturer's technical data sheet for the specific coating system.

The Project Manager should work backwards from the planned launch time and establish the latest acceptable completion time for:

• surface preparation

• primer repairs

• intermediate coats

• final antifouling coats

• block-contact areas

• final inspection

• required curing before immersion

BLOCK-CONTACT AREAS

Keel blocks and side supports prevent access to small areas of the underwater hull during most of the dry-dock period.

These areas should be identified early and a controlled plan established for completing the coating system before launch.

Where a block requires repositioning, the movement remains under the authority of the appropriate docking or engineering personnel.

The block should not be moved informally simply because the paint contractor requires access.

After authorised repositioning, the exposed area may require:

• cleaning

• surface preparation

• primer repair

• intermediate coating

• antifouling

• inspection

• sufficient curing time before launch

ANTIFOULING EXCLUSION AREAS

Not every underwater component should be coated with the same antifouling system as the hull.

Before application begins, the coating team should identify equipment requiring masking, protection or a specialist coating treatment.

This may include:

• sacrificial anodes

• reference electrodes

• bonding plates

• transducer faces

• speed logs

• sonar equipment

• shaft surfaces

• propellers

• seals

• bearing surfaces

• stabiliser seals

• thruster components

Sacrificial Anodes

Sacrificial anodes should remain free from paint contamination and should have the required electrical contact with the structure they are intended to protect.

The correct type, quantity and location should be verified before launch.

UNDERWATER CLEANING & IN-SERVICE MAINTENANCE

The cleaning method used after launch should be compatible with the installed coating system.

Aggressive cleaning can damage antifouling or silicone foul-release surfaces and significantly reduce service life.

The Project Manager should ensure that the Captain and crew receive the relevant coating-maintenance guidance at handover.

This should include where applicable:

• permitted cleaning methods

• prohibited brushes or abrasive tools

• diver-cleaning limitations

• local repair procedures

• treatment of mechanical damage

• recommended inspection intervals

• product details required for future repairs

FINAL UNDERWATER COATING RECORD

The Project Manager should maintain a final coating record including where applicable:

• coating manufacturer

• system specification

• product names

• batch numbers

• application dates

• environmental records

• DFT results

• antifouling application dates

• block-patch completion

• anode installation

• masking and exclusion areas

• coating defects and repairs

• final inspection photographs

• immersion date

PROJECT MANAGER COMPETENCY TEST

Scenario 1 — Dew Point & Condensation Risk

The paint contractor is ready to apply primer to a prepared steel surface. The surface appears dry, but environmental readings show that the steel temperature is very close to the calculated dew point.

Question:

What should the Project Manager do?

A. Allow painting because no visible water is present
B. Proceed if the contractor promises to apply a thicker coat
C. Confirm that the environmental conditions comply with the coating manufacturer's requirements before application begins
D. Warm the paint only and continue

Scenario 2 — Excessive Fairing

Following a steel-plate replacement, the paint contractor proposes applying a deep layer of fairing compound to hide a visible change in the deck profile.

Question:

What should the Project Manager do first?

A. Approve the fairing because filler is easier than correcting steelwork
B. Confirm that the underlying structural alignment and repair are technically acceptable before allowing cosmetic fairing to conceal the area
C. Apply additional topcoat instead
D. Ask the contractor to use a harder fairing compound

Scenario 3 — Maximum Overcoating Window Exceeded

Programme delays mean that an intermediate coat has remained exposed longer than the maximum overcoating period stated in the manufacturer's technical data.

Question:

What is the correct response?

A. Apply the next coat normally because the previous coat is completely dry
B. Increase the thickness of the next coat
C. Follow the manufacturer's required surface preparation or remedial procedure before overcoating
D. Add thinner to the next coat to improve adhesion

Scenario 4 — Antifouling Programme Pressure

The yacht is scheduled to launch shortly. The final antifouling has been applied, but a programme change would require the yacht to remain ashore longer than originally planned.

Question:

What should the Project Manager verify?

A. Nothing, because antifouling can remain ashore indefinitely
B. Only whether the colour still looks correct
C. The coating manufacturer's permitted curing and maximum immersion interval and whether additional action is required before launch
D. Whether the crew is prepared to wash the hull before departure

Scenario 5 — Silicone Foul-Release Selection

An owner proposes changing to a silicone foul-release system because the yacht will operate between the Mediterranean and Caribbean. The yacht cruises regularly during the season but can also remain alongside for several weeks at a time.

Question:

What should the Project Manager consider before recommending the change?

A. Only the purchase price of the silicone coating
B. Only the yacht's maximum speed
C. The operating profile, periods stationary, existing coating compatibility, preparation requirements, application system, cleaning limitations and future maintenance strategy
D. Whether nearby yachts use the same colour

MODULE COMPLETION

Before completing this module, the Project Manager should be able to:

• Obtain and understand the approved coating specification

• Confirm the substrate and condition of the existing coating system

• Verify compatibility between existing and proposed coating products

• Understand why surface preparation is fundamental to coating performance

• Confirm the specified surface-preparation standard before coating begins

• Coordinate removal of contamination, salts, dust, corrosion and failed coatings

• Monitor ambient temperature, substrate temperature, relative humidity and dew point

• Recognise condensation risk before coating application

• Understand the typical sequence of primer, fairing, intermediate coats, undercoat and topcoat

• Recognise that fairing is not a substitute for unacceptable structural alignment or defective welding

• Coordinate fairing and surface-profile inspections before finishing coats conceal the work

• Understand the importance of stripe coating on edges, welds and difficult geometries

• Understand the purpose of Wet Film Thickness and Dry Film Thickness measurements

• Monitor minimum and maximum overcoating intervals

• Recognise that programme pressure must not override required curing periods

• Identify common coating defects and investigate their underlying cause

• Maintain product and batch traceability where required

• Understand the difference between conventional antifouling and silicone foul-release systems

• Consider vessel speed, activity, operating area and periods alongside when reviewing an antifouling system

• Consider Mediterranean and Caribbean operating profiles when reviewing underwater coating strategy

• Coordinate final antifouling application with the planned launch date

• Verify the manufacturer's required curing and immersion window

• Coordinate completion of keel-block and side-support contact areas

• Ensure sacrificial anodes remain free from inappropriate coating

• Ensure transducers, sensors, seals and other exclusion areas are correctly protected

• Confirm underwater cleaning procedures are compatible with the installed coating system

• Maintain environmental, application, DFT and inspection records

• Record coating defects, repairs and final acceptance

• Provide the Captain and crew with relevant coating-maintenance information at handover