I successfully re-painted our 20 year old ski boat. Lots of prep. Remove all hdwe.; patch nicks & dings; sand ENTIRE boat with 100 grit for "tooth". Wipe down entire hull with lacquer thinner to remove all silicones,waxes, and fingerprint or skin oils. This is most important. Use Dupont Imron. It's 2-part, with hardener, get it at auto paint shop. I shot several coats of primer, ($75 per gal.); 6coats of color(red $150 per gal., the most expensive color), then two clear coats.($75 per gal.).You recoat in 45 min.-8(?) hours, or it hardens so much that you must wait 3 days, resand for tooth. I shot all coats in one day. Ten years later it still looked fine, and held up to weekly use and normal abuse. (P.S.) the prices were in 1986.