I put antifouling on my boat becuase i have no other choice but keep it in the water. first i sanded off the bubbled areas and most of the gel coat. I did 5 coats of interlux interprotect 20o0e to prevent water from getting into the hulls and followed it with 2 coats of interlux ultra with biolux(antifouling). the results looks great and the paint performed amazingly. Not a single spot of algae, slime, or any typ of fouling were on the antifouling. The boat was in a dirty lake for 2 months. Here are some pics of the boat and i will post more of the actaul painted hull now that it is out of the water.