Wet tumbling brass strikes me as the most efficient way to retrieve their original brilliance. Lyman’s Cyclone wet tumbler with stainless pins in cleaning solution gave me dazzling results in less than an hour.
Lyman 7631550 Cyclone Rotary Tumbler 115V,Multi
Lyman 7631550 Cyclone Rotary Tumbler 115V,Multi
Lyman Cyclone Rotary Case Tumbler 115V, Tumblers - Canada
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Lyman Cyclone wet tumbler for brass
Wet Tumbling Issue
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First time wet tumbling (left) : r/reloading