Aluminum Surface Oxidation How To Deal With??

Let it oxidize, because the aluminum oxide layer can prevent the internal oxidation, if sandpaper grinding, after a period of time aluminum will be oxidized, over time will damage aluminum products, so don't leave it alone. Aluminum surface oxide film can prevent its further oxidation, remove will lose protection, oxidation again quickly, the way to deal with is, either do not move, or with sand grinding, plating something

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