When painting on any floor, planning is important. Applying bottom paint to boats isn’t the cleanest of work, but it’s really straightforward. If you have a new boat or one that already has antifouling paint on it, take the measures listed below to ensure a decent bottom paint job. If you wish to learn more about this, visit paint supply.
Preparation of the Bottom Paint for Boats on Bare Fiberglass
Prior to sanding or applying a Sea Hawk System to a bare fibreglass or gel coat hull for the first time, it is critical that any contaminants such as grease, tar, wax, salt, or other foreign material be fully eliminated.
Scrub the floor with a rigid bristle brush and detergent soap.
A. Use S-80 Wax N’ Grease Killer solvent-based dewax to clean and de-wax the fibreglass hull. To extract any cleaner or toxins, soak a cheese clothrag in water and scrub it off. To ensure toxins are totally safe, remove any residue until it dries and change rags regularly.
B. Scrub vigorously with S-90 De-Wax Etch & Cleaner and a maroon 3M Scotch-Brite pad. Enable the cleaner to dry on the surface before removing it with water. Rinse the whole surface with water and look for some beading on the surface, which indicates the presence of wax. If required, repeat step 2 until the soil is completely free of contaminants.
Clean and sand the hull
Sand with 80-100 grit (no finer) sandpaper to a uniformly frosty, dull-looking base, then rewash with S-80 Wax N’ Grease Killer and S-90 De-Wax Etch & Cleaner.
Paint the bottom of the building.
Apply two coats of paint at the very least. Until launching, allow 3 to 6 hours between coats and at least an overnight dry time. It’s likely that certain paints would take more than two coats.
Tip: The only way to shield your boat from blisters is to use epoxy systems on the bottom of bare fibreglass. It also improves the antifouling paint’s adhesion to the hull. For instructions on how to properly apply a marine epoxy primer (barrier coat system) to the bottom of a boat, click here.
Paint Preparation on the Bottom Over Existing Paint
Using a pressure washer or a detergent to disinfect the remaining boat bottom colour. Scraping and/or muratic acid may be used to eliminate excess growth if necessary. Attempt to remove the growth residue from the original old paint so that the new bottom paint adheres well.
Scuff sand the surface to a dull appearance with 80-100 grit (no finer) sandpaper, then clean and dry. If your old bottom paint is particularly chalky, a more vigorous sanding could be necessary to ensure better adhesion of the new paint.