Rusty rudder
Member
Need some information on what's the best cleaner to remove water level stain on outside of hull thanks!!!
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Is the stain on the gel coat of a hull made of fiberglass? If so, I've been pleased with the results of using Davis "Fiberglass Stain Remover". It comes in plastic jar labelled "FSR". The product is a gel that I apply with a rag (wearing rubber gloves). It takes a little scrubbing with the rag and leaving it on for a few minutes, but when you come back with a clean dampened rag, the stains come right off.
https://www.davisinstruments.com/product/fsr/
If the hull doesn't look like fiberglass strands or matting in resin, it has some kind of gelcoat or paint on it. Bare fiberglass/resin doesn't last long on a hull that's in water for long periods. Post a photo.It's a older boat dont think it has any gel coat just fiberglass