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Can anyone refresh my memory about the potion for rust stains on fiberglass, it was some time ago. Thanks

Mitch,

Wink for rust stains anywhere... Careful, it's dilute phosphoric acid. Cleaning section of your local super market, brown plastic bottle.

Br,

Patrick

I have used "ON OFF"(I think that's what its called) Its the stuff you use on your hull to get the water line stains off. Be careful it is a mild acid but it works.