Join Date: Jul 2000
Thanked 235 Times in 222 Posts
Rep Power: 18
Fiberglass (delamination??) repair
Probably a simple ''void'' or gas pocket that formed during layup - a fairly common occurance in older boats. I''d inject polyester resin to fill the void. I''d avoid epoxy for this injection in case the void is too deep causing excess heat build up with an epoxy that may break the surface with extreme pressure as the epoxy ''kicks''.