Just my opinion but for the price of bulk walnut and corn media and a bottle of Nu Finish You can clean tons of brash for next to no expense,

That's why it always amazes me that some folks say they never change their media. It's so cheap, it works better when new and not clogged with toxins and the sharp edges are gone. Pretty much like extra fine sandpaper. You don't keep using the same worn out piece forever. It just doesn't work well.

Heck if you wash your brass (soak it in a 5 gal bucket with some vinegar and salt for 15 minutes) then rinse you do not even need to tumble. If you do, it takes maybe 1-2 hours and it's done.

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Still Running Against the Wind