I too haven't seen zolotone used on fiberglass.

I re-painted the interior of my 1st sled, a 18' Fishrite. Bought the zolotone (kinda spendy) and used a HVLP gun (probably the wrong applicaion but it was all I had access to). I had never painted anything except my 1st JEEP with rattle cans. It turned out great. I used their clear coat and applied 3 coats. If zolotone is not clear-coated it doesn't last long IMO. STAM and ondarvr are the resident paint experts here on PP from what I can discern, so I'd listen to them.
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..."the clock looked at me just like the devil in disguise"...