I've been surfing the internet lately finding all poosible maintenance that needs to be completed before spring. I stumbled on the blistering problem fiberglass boats have. I purchased a 1987 26.5 last summer. The boat did not come with a trailer. The previous owner states that the boat has never left the water since she arrived 20 years ago. There was substational algea growth below the waterline. I planned on removing the algea this spring using diving equipment and burber carpet. I've got blistering of the mind now because everything I read about it states that if the boat has been in the water for a long period of time, fresh or salt, blisters will occur. There is not a marina to accomidate sailboats at this lake. I am about to join a sailing club that has a universal trailer that my boat will fit on. Should I wait to spend anymore money on cosmetic boat projects until I can check the underside? Or am I just worrying over nothing. The marina owner who sold me the boat stated that I should not worry about blistering due to the undercoat. This being my first boat purchase I think I might of made a mistake due to lack of research, investigation, and overall fiberglass boat maintenance knowledge. Any ideas?