You can get the Super Ship Bottom direct from the mfg. Google Super Ship Bottom. When you call them, you get a genuine person who answers the phone. They will answer any and all questions. As stated, it has only been no the boat for about 16 months now, but so far is doing very nicely. I had my doubts when the water temps were approaching 90, but so far so good. I used two coats on the bottom and three on the water line.