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Old 01-28-2015, 11:15 AM   #14
ghost
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City: Anacortes
Join Date: Nov 2012
Posts: 1,189
Anything acidic seems to work, but in this case a packaged marine product really does work, FSR. It's just oxalic acid in a gel base, but it is the gel base that is the magic. One, it lets it cling to a brush so you can easily apply it without having to break out a rag by hand. Second, it slows the drying just enough that it works a little longer and better. I like being able to just squirt some on a soft boat deck brush and quickly get a larger area. Don't scrub, let the product work.

The acidic products also work well for rust stains from stainless hardware.
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