 It is widely suspected that the new resin was responsible for extensive non-osmotic blistering of the hulls, deck, and cabin-house structures in boats built between 1976-1981.Many of the "blister boats" were "repaired" by stripping the outer layers of fiberglas off the exterior of the hull (either undersides and topsides, or just undersides below the water line).The repair then involved drying out the stripped hull for several months (commonly in the California or Mexico desert), followed by reglassing the exterior with several layers of fiberglas with vinylester resin or polyester resin.