When it's time to remove old bottom paint, you have a few options, including sanding, using chemical paint stripper, or having the surface soda blasted by professionals.
Sanding: Bottom paint can be sanded off using 60-80 grit sandpaper. Sanding bottom paint should only be done using a dustless sander hooked up to a vacuum in order to greatly reduce sanding dust in the environment. Before sanding, we also recommend laying down poly sheeting beneath the boat to capture any settling dust or debris.
Stripping: Paint removers such as TotalBoat TotalStrip can also be used to remove old bottom paint. TotalStrip is odor-free and very easy to apply. For best results, apply TotalStrip in temperatures from 60-80°F.
|Use a brush, putty knife, or roller to apply 1/4" to 1/2" thick, wait 15 minutes or until the paint blisters.
|If removing multiple layers, cover with plastic wrap or wax paper and leave on for 8 to 12 hours.
|Remove the plastic and scrape the surface with a putty knife.
Soda blasting: Another option for removing old bottom paint is by professional soda blasting, which involves high-pressure spraying of specially granulated sodium bicarbonate (baking soda!) directly onto the painted surface. Soda blasting is considered to be much gentler than sandblasting because the sodium bicarbonate shatters on impact.