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Showing results for tags 'polish'.
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I am forging 304 stainless steel. It has a hammer textured surface and want to remove the blackened surface but not remove the hammer marks with grinding. My goal is to remove the blackened surface and then wire wheel to brighten the surface. I soaked it overnight in a citric acid bath. The solution is a concentration of 1 pound citric acid/ gallon of water. There was no discernable change in the blackened surface. I did get some cleaning benefit using BarKeepersFriend (Oxalic Acid). Any suggestions?