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These sanding sponges by 3M (an industry leader in abrasives and adhesives) are an absolute lifesaver when it comes to quickly refurbishing flea market finds. Remove tarnish from old metals if that’s your style, or selectively brighten up areas of vintage items while leaving the rest patinated. Choose your sanding grit wisely: the item linked is “extra fine,” but you may want to search for a tougher grit if you’re looking to do aggressive removal of material. We also love them for toning down the high shine of new metals.