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Chrome plating has micro cracks in it. The copper and nickel plating under the chrome do most of the corrosion protection of the underlying steel If rust has shown on the surface, the copper and nickel have failed at tiny locations . A low viscosity oil will penetrate the cracks in the chrome and give some protection to the steel . Not many other choices. I ...


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For larger fasteners, a bigger issue, when working on a rusty vehicle especially, is rounding the bolt heads/nuts with an impact gun. For smaller fasteners, breaking the bolt is probably more likely. If you are concerned with either scenario, break the fasteners loose with hand tools (either a small ratchet or a breaker bar, depending on the fastener) so ...


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