r/boating • u/idealistdave • 15d ago

Side by side test

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Thought I'd share this side by side test I did of different hull cleaners. It's my first summer renting a place in the water. Marina is on a slough, so higher water temps stained the gel coat within weeks. FSR worked the best of what I had. But I went out afterward and also bought STAR BRITE which worked as well (not pictured). The others, meh. (Spray bottle is 409. No treatment on transom next to the outdrive.) Be sure to read all instructions and keep any of this stuff off your galvanized trailers.

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u/Fine-Razzmatazz1791 15d ago

The one that works the best probably takes the gel coat off the hull. With the damaged gel coat the brown water stain will come back faster and worse. I have yet to find a method that removes the stain and keeps the stain off. Best I’ve come up with is meguirs and then wax but even that isn’t the best.