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.
What's your favorite wet tumbler? Don't say RCBS.
Lyman Cyclone Rotary Case Tumbler 115V, Tumblers - Canada
Wet tumble ancient brass : r/reloading
Lyman Products Cyclone Brass Case Dryer 115VT, Grey, One Size : Sports & Outdoors
Bundle - CED Brass Tornado, Lemi Shine and Lyman Turbo Sonic
Wet Tumbling Brass with the Lyman Cyclone - The Armory Life
Lyman Cyclone Tumbler Review and Home Remedy Chemicals
Recommendations for brass cleaning and what else am I missing? : r/reloading
Hornady Rotary Case Tumbler, Reloading: Creedmoor Sports Inc., Brass Tumbler
Lyman Cyclone Stainless Steel Rotary Case Tumbler: From Unboxing to Wet Tumbling Brass