I've used Hydrocoat for years. It's easy to work with and was effective against marine growth and slime for my boat(s) sailed on inland lakes.
My Catalina 25 would stay in the water from May to November - and be stored on a trailer the rest of the time.
Hydrocoat was still effective the following season.
(one suggestion: my first coat was red. The topcoats were blue. Whenever I see the red color beginning to appear, it was time for blue touchup).
Last edited by msl; 12-13-2009 at 08:51 AM.