I don't know where spraying PVA over wax free gelcoat started, but working with fiberglass extensively since 1968 and a decade in Professional Custom boat building I have never worked in a Professional boat yard that used PVA over gelcoat in place of wax additive in the gelcoat...never worked with any reputable professional boat builder who used PVA over gelcoat in place of wax additive in the gelcoat, never heard a factory rep for any major fiberglass supplier ever recommend anything but putting wax "in" the gelcoat before it is applied. I can't understand why this method keeps coming up every time there is discussion on fiberglass repair or refinishing as it is not the industry standard and the proper products are readily available to ensure the consistent quality results the Fiber Reinforced Plastics Industry has spent over a half a century perfecting.

Regards,
Bob