My panels are stock fiberglass. I was told because the panels are injected made rather than hand laid that there is a release agent in the resin to help it not stick to the mold. You should use epoxy resin it bonds better than polyester resin
Check out empiregp.com. This guy can take even the most thrashed and destroyed fairings and make 'em as good as new, cheap. I had him do a repair on a '95 SS SP fairing and you absolutely can not tell it was ever damaged. Fabulous job! Stunning, perfect, awesome, I could run out of adjectives describing this guy's work.