Amazon has the 1 Gallon WD-40 300045 Specialist Rust Remover Soak for $26 - $10 off with coupon (click "Clip this coupon") = $16 with free shipping. Goes for $21+ elsewhere. Non-toxic, biodegradable soaking solution removes rust from corroded metal.
Retail: $29

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    dave_c Ben's cred: 3863
    Posted 3:47 pm PDT 09/4/13

    Hmm, they don't even list the ingredients in the MSDS. Nice that it's non-toxic but it's very likely you'll get a lot more rust removal for the money by just buying a gallon of 85% phosphoric acid off eBay or Amazon, and then as a bonus the area the rust was removed from will end up with a rust resistant phosphate coating on it.

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