Catman, While I agree that there are problems covering paint with gelcoat that should show up as a peeling gelcoat problem not what is happening on his hulls.

My only guess is that a heat lamp was used to set off the repaired area. The area got very hot and the foam under the skin shrunk from the heat. The outer layer wasn't affected. But now a void was under the outer layer. After the boat was in the sun for a while the unsupported outer layer of glass fell to conform to the shrunk foam. Thus causing the ripples.

That's my best guess. It doesn't help the situation but I hope that the boatyard will take responsibility and fix the issue.

Mike Hill
www.stlouiscats.com