I am restoring an old Lionel 1101 locomotive. I want to improve the appearance of the wheels. I am not sure, but they appear to be sintered powder metal parts. A black oxide coating would give the wheels a nice new appearance. Is this something that I can do at home - or should I send it out to a shop that specializes in industrial coatings? I read that sintered PM parts should be resin-impregnated prior to being coated with black oxide. Has anybody here ever done that?
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