Bubbles (poorly filled areas) are one of the defects home garage repairs will fight. It is easy to take a small item as a paddle which has been glassed, insert it in a plastic bag and pull a vacuum with a vacuum cleaner to fill voids. (Kevlar fabric is harder to wet.) Yes there can be wrinkles generated but my feel is I have wanted to sand the cured to polish the surface whether bagging the item or doing it atmospheric. Polystyrene resin isn't supposed to have constant contact with water. Epoxie or marine paint makes a safe top coat.
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Posted by: wavetamer on Sep-07-11 9:52 AM (EST)
Good info, thanks. If I read this correctly you infer sanding Kevlar, too? My experience and at the warning by others is that it cannot be sanded without leaving a frizzy surface. Personally if I had to do a serious repair I'd take it to a friend who works in fiberglass all the time.