are many different opinions on what and how to use the variations of paint and primers available. Here is a standard paint system that will guide and advise the user on the type of paint to use depending on substrate and condition.

New fibreglass has to be at least 4 weeks old before a paint system can be applied. Usually the fibreglass that is to be painted is much older and this surface must be cleaned with soapy water in order to remove all water-soluble dirt. After drying, degrease with Epifanes Fibreglass Prep Cleaner to remove all wax substances. Make sure that the cloth is renewed constantly so that all grease, wax, etc. is not just replaced, but completely removed. This is important in order to avoid the possibility of any remaining dirt or wax being sanded into the surface.

Before continuing with the process, check the condition of the fibreglass to be painted. If the gel-coat is smooth and only shows discolouration or slight loss of gloss, the fibreglass surface will only require a light sanding with 320 grit dry abrasive paper. Clean the entire surface once more with Epifanes Fibreglass Prep Cleaner.
All cratering and cracking must be checked. If the damage is caused by a weakened fibreglass laminate, necessary repairs must be made first. If existing craters and cracks are stable, they may be filled to a smooth surface with Epifanes Fibreglass Filler (above the waterline) or Epifanes Epoxy Filler 1500 (below the waterline). Make sure that all craters and cracks are filled thoroughly. If necessary, sand inside the cracks before filling to ensure good mechanical bond. When the filler has cured, lightly sand the entire surface with 280 grit dry abrasive paper. Only after this preparation has been completed, a paint system can be applied.

IMPORTANT: On the areas of the surface that have been filled with Epifanes Fibreglass Filler, apply one coat of the chosen paint, thinned 15 %. This acts as a sealer coat and prevents moisture from entering the filler. We recommend applying the sealer coat immediately after the Epifanes Fibreglass Filler has cured (30-60 minutes). Sand the filler with 280 dry abrasive paper before applying the sealer coat. After drying (24 hours) lightly sand the sealer coat.

One component paint system on fibreglass above the waterline
After surface preparation

StepsProductNumber of CoatsEpifanes ThinnerThinning Ratio %Drying times at 18oC, per coatAbrasive PaperRemarks
1Epifanes Multimarine Primer1Brush Thinner for Paint & Varnish0-524 hours320 dryNecessary if over-coated with Epifanes Yacht Enamel. Fills small irregularities in the gel-coat and provides even colour. May in any case be tinted with finishing paint.
FINISH BY CHOICE WITH:
2Epifanes Yacht Enamel3Brush Thinner for Paint & Varnish0-524 hours400 wet or finer
OR:
2Epifanes Mono-Urethane3Brush Thinner for Paint & Varnish0-524 hours400 wet or finerMay also be applied directly onto smooth gel-coat. In this case thin the 1st coat 5-10%
OR:
2Epifanes Nautiforte3Brush Thinner for Paint & Varnish0-524 hours400 wet or finerMay also be applied directly onto smooth gel-coat. In this case thin the 1st coat 5-10%

What to do on an existing one-component paint system on fibreglass above the waterline and maintenance.

If the paint surface is intact; clean, degrease and sand with 320 grit wet or dry abrasive paper to a smooth surface. Over the original paint, apply one or two coats Epifanes Yacht Enamel, Epifanes Mono-Urethane or Epifanes Nautiforte. If required, use Epifanes Fibreglass Filler and/or Epifanes Fibreglass Primer first. For this system procedure, refer to the one-component system mentioned above.

Two component paint system on fibreglass above the waterline
After surface preparation

StepsProductNumber of CoatsEpifanes ThinnerThinning Ratio %Drying times at 18oC, per coatAbrasive PaperRemarks
1Epifanes Epoxy Primer1Thinner D-6010-524 hours2200 dryFills small irregularities in the gel-coat and provides even colour.
2Epifanes Poly-Urethane3Poly-Urethane Brush thinner0-524 hours400 wet or finerIf subsequent is applied within 48 hours, sanding between coats is not required. If directly applied on gel-coat, thin 1st coat 5-10%.

IMPORTANT: On the areas of the surface that have been filled with Epifanes Fibreglass Filler, apply one sealer coat of Epifanes Poly-Urethane, thinned 15% with Epifanes Poly-urethane Thinner. This sealer coat prevents moisture from entering the filler and prevents absorption of subsequent coats into the filled areas. We recommend applying the sealer coat right after the Epifanes Fibreglass Filler has cured (30-60 minutes). Sand the filler with 280 grit dry abrasive paper before applying this sealer coat.

What to do on an existing two-component paint system on fibreglass above the waterline and maintenance.

If the paint surface is intact, clean, de-grease and sand with 320 grit wet or dry abrasive paper to a smooth surface. Over the original poly-urethane paint, apply one or two coats Epifanes Poly-Urethane. If required, use Epifanes Fibreglass Filler and/or Epifanes Epoxy Primer first. For this system procedure, refer to the two-component paint system mentioned above.