Investment
In 1999, we got caught in CA by the EPA ruling that only water-based paints could be used. They were definately poorer, but I put on three coats and the protection lasted 3+ years.This year, we used Z-Spar B-90 (The Protector, with very high Cupric content). This time, two full coats, with a third on the waterline and rudder. Expect to get 4 years.If you are putting forth all the effort and expense to haul, clean, repair, fair, mask, etc., another gallon of paint for the 2nd coat over top of all that prepared hull is not too much of an expense if it gets you another year or two.