We painted over the fiberglass in our old Solaris about 6 years ago. Looked ok but didn't hide the fiberglass look. I've looked at the deck restore product in Home Depot and thought it may be the answer. A really textured paint designed to be durable. I think it come in a variety of colors including white.
little black door: the deck a year later - restore armor review
little black door: the deck a year later - restore armor review