On and Off sold in marine stores, or muriatic acid. Rinse thoroughly after use and be aware that drips will attack and discolor paint - especially bottom paint.tea-colored water stains
Like they do on Basketball courts, no black smudging sneakers allowed on the boat.black smudges from sneakers,
These are a result of the water you sail in.tea-colored water stains along the hull
These are a result of the water you sail in.
- Bar Keeper Friend is Oxalic acid. It works on fiberglass to remove organic stains. It may etch or dull polished surfaces as it contains micro abrasives