[Fr. Frank]

Probably the best fiberglass guy north of St. Pete and east of Houston is John Sullivan of American Mold and Fiberglass in Niceville, FL. (He's the kind of fiberglass guy who has the exotherm values and rates of various mixtures of resin and catalysts memorized !) His work with gel coat is amazing.
The downside is that the waiting time to get into his shop can range from 6 weeks to a few months, depending on the season. A whole lot of people are willing to wait to get John and his guys to do the work on their boat. Current back up is into January.
But if you don't need Ferrari-quality work, there are a number of people who do very good work in the Destin to Navarre stretch, and there is a couple over by the Naval Air Station in P'cola with excellent reputations.

While Sunshine does great work on fuel tanks, RJS in Perry, (south of Tallahassee) is also very good, and was an OEM supplier of fuel tanks to SeaCraft in the 70's and 80's. When I replaced the original tank on my '74 SeaCraft Tsunami, it was an RJS tank. RJS built me a new one by copying my old and it fit perfectly. I did NOT, however, foam the new tank in place. So when I replaced the tank on my previous 20' Seafari, I went back to them, and was again very pleased.