Secondary bonds with polyester are not strong. Sand thoroughly and use epoxy.

Whoever's compiling the FAQ, add this one.

Lloyd Sumpter wrote:

Hi,

I'm doing some repairs to my Catalina 36, which is made from polyester
resin/glass over wood (like most "fibreglass" boats). Should I stick with poly
resin, or go with epoxy? I know epoxy is "better", but I'm concerned that it
wouldn't stick well to the existing poly, and that the (poly?) gelcoat won't
stick to it.

Suggestions?

Lloyd Sumpter
"Far Cove" Catalina 36