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david pierce

    I live in a part of the country that has a lot of rain and deal with a lot of rust; mainly on machinery surfaces. If you sand and grind a metal surface to the point where it looks clean to the naked eye and then put it under a microscope, you will see small pits in the metal that are still filled with rust. The only way I have found that works is to treat the rusted area with a rust removal chemical. I buy it from a woodworking supply but any hardware store or home improvement center should have it.