Ace tactical shooter and gunsmith Jim See of Elite Accuracy LLC recently tested a Frankford Arsenal rotary brass tumbler. Like the older Thumbler's Tumblers, this can tumble your cases in a liquid solution. The wet-tumbling process worked very well Jim reports.
Wet Tumbling and water marks
Wet Tumbling Issue
Cartridge Brass « Daily Bulletin
Wet Tumbling Brass Tennessee Hunting & Fishing Forum
Wet Tumbler Long Range Hunting Forum
What is the best way to clean spent brass without a tumbler? - Quora
Moving from dry, corncob media to wet tumbling is a GAME. CHANGER
Wet tumbling: Results of my 'pins/no pins' 'soap/no soap' tests
TFB Armorer's Bench: Using The Frankford Arsenal Rotary Tumbler
Problems wet tumbling? Brass is dingy gray, or tarnished reddish
Cleaning and Preparing Brass Casings for Reloading: A Quick Guide —