It occurs to me that I haven't seen a post dealing with cleaning the hypalon or PVC inflatables. My dinghy floats in front of the boat in my slip most of the summer except for my summer cruise. The river water is simply nasty and stains the PVC to no end. Hypalon dinks don't fair any better so, how to clean? I tried scouring power and a stiff brush and it did OK but didn't get all the stains out. Then I tried a combo of scouring powder and Tilex cleaner and that worked pretty good but still left a bit of water line mark.Finally I used simply Bar Keepers Friend and the dirt and stains disappeared. I'd like to take credit for it being an original idea but another boating friend showed me the stuff and how well it works.*!So, if your dinghy is befouled and you're tired of the elbow grease it takes to clean it like new I recommend Bar Keepers Friend. ;D