Many years ago I was forced to 'bite the bullet" and buy a scuba cylinder tumbler to clean some rust from inside of my high-pressure steel 130s.

http://www.gmcscuba.com/ProductInfo/42000.aspx

Recently I bought a cylinder for an industrial rock tumbler that fits nicely on my scuba cylinder tumbler. I throw in some nice, clean, dry sand and my mail comes out nice and shiny. :D


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