Quoted from DrMark12PA:Will the vibrating tumbler help with pieces as picture below (a lock bar handle)? I've already polished it with "Liquid Metal Polish" and a paper towel so nothing overly aggressive. It did shine up parts of it but it still has very shallow pitted areas of rust/black.
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Maybe have these types of parts powder coated?
Once and done with it, no more dirty "pits" in the metal to look at,
and you can color co-ordinate it with the pin?