I recently purchased this boat and it had been sitting for a few years. Cleaned the boat this past week and followed the recommendations from various posts. The best results came from using Soft Scrub with bleach (lemon) a green scrub pad and lots of elbow grease! I used the soft scrub liberally (about 3/4 of a bottle) and went through half a dozen scrub pads and then rinsed it down with a pressure washer. I also used simple green and a magic eraser on certain spots. I cleaned the trailer and wheel wells so everything is looking good. This is a 2005 but it cleans up nice.