Quote:
Originally Posted by minke
Are you and the manufacturer sure that it is gelcoat? The reason that I ask is that (on boats and maybe trailers) there is a female mold that has the gelcoat applied to it. Then the fiberglass and resin over that, and finally paint on the inside surface.
|
The norm for cosmetically finishing the reverse side of a
fiberglass molding is to apply 'flowcoat' (sometimes called 'topcoat'), which is regular gelcoat resin with about 2% wax in styrene added to it - the wax comes to the surface of the resin and provides the airtight barrier the enables the gelcoat resin to fully cure.
Paint is for more aesthetically-demanding applications, as flowcoat will never give a perfectly smooth glossy finish - though one coat of flow coat is about as thick as ten coats of
paint, so it's a lot tougher.
Nowadays I would be surprised if someone like
Scamp, who must get through a lot of resin, would bother making flowcoat by adding wax to gelcoat resin - I would expect them to buy it ready-mixed.