Removal of inner skin. Removal of wet balsa, recore with new balsa. New glass inner skin. 40 years salt water last 2 fresh. Keel is glassed but it is swelling and cracking with some glass missing.
Question is what to do.
Boat will always be in fresh water and kept in a slip. Considering trying to save the very substantial oak frames by scarfing in and sistering on. I had a blister problem on a new C320 Catalina Sailboat. The blister repair was done 10 months ago with 3M Products. When I pulled the boat out of the water this fall the blister were back.