formula72 ,
When I did the floor in my 20 footer, I removed the carpet, filled any holes and used the one part epoxy that Boaters World sells, think its Top Side or similar name. After applying the first coat, as it was still wet I sprinkled sone fine sand oner it with a home made type of salt shaker. When it dried I vacuumed off and loose sand and rolled the second coat over the sand. It has been three years and has held up amazingly well. If it wasn't for the fact I had to remove several sections of the deck to replace a stringer, it would have made it through this comming season.
Before the first coat I also used some 1" wide masking tape to create a "panel" effect like you see on the newer boats, before the second coat I removed the tape and those area's are glossy with no sand and I think it turned out great. Like you stated carpet is the most impracticle thing for salt water fishing, I scrub this thing pretty good and has held up great and can be touched up from time to time.
Good luck,
Butch