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By the way all those black phosphate body bolts and screws, that is a factory finish, similar to Parkerizing, developed for firearms back during WW2. It is a porous finish that will last forever as long as they have a tiny amount of oil saturated into the molecule deep finish. Clean them with detergent and a toothbrush, dry them with compressed air then resaturate with WD-40. After a day or so wipe off excess. Do this annually and they will look new.
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