We've used SR60 for the past two years on the Chesapeake. The bottom almost doesn't need to be power-washed when we haul for winter. Of course, it's the Chesapeake, not Florida, and we haul for winter. But for what it's worth, we've had a good experience.
If you're doing the application, I found the suggested thinner useful when it was warmer or windy. I stuck to the recommended ratios, but it did help the paint flow better.
Best of luck,
1984 Sabre 34 Mk I