Last December I purchased a 21' Dolphin Products boat with a 175 hp Evinrude. I later found out that the boat had obviously been sunk in saltwater, and had been cleaned up where visible pretty well but the non visible areas were a mess. <br />I've refurbed the motor, trailer, and the interior of the boat and now need to clean the bottom. The previous owner had scraped most of the barnacles off the bottom, but there is a lot of thin residue that has hardened. I can scrape it off with a putty knife but that's a long tedious task with the risk of damageing the bottom. I've been told that the fiberglass bottom can be sanded with "medium" grade sandpaper, but I'm not sure if that is correct, or if it is what grade of sandpaper to use.<br />Does anyone have any tips for cleaning the bottom of this boat. <br />I'm getting close to the maiden (for me)voyage, but I would like to clean the bottom before I put the boat in the water.<br />Thanks,<br />Bill.........
