If you are keeping your vessel in the water for extended periods of time, don't neglect what you can't see. Electrolysis causes barnacle growth under the water on your beautiful gelcoat. Not only does it look and smell horrible, but it also creates drag which is slowing you down and killing your gas mileage. We use a two part epoxy primer that is built up in two protective coats and shrinks around the area to create not only a protective surface but also a barrier. On top of that, we put two coats of antifouling ablative paint with or without copper depending of the surface that will slowly diminish and self clean over time to prevent barnacle growth and keep your vessel running smooth for years to come.