Unfortunately, there is no metal that exists (even stainless steel, despite the name) that is completely protected from staining and discoloration. If it is exposed to air, every type of metal can develop stains that can lead to rusting and corrosion in time. But that is no reason to discard this valuable material. At Able Electropolishing, we have been restoring and prolonging the life of metal parts for almost 60 years. Our qualified engineers and technicians are here to listen to your concerns and offer the best possible solution.