I picked up a substantial amount of brass at the range the past two weeks. Mostly mixed .40S&W (yes, I reload it), 9mm (yes, I reload that too), some .380's (don't reload those, yet), and quite a few .38's (for a rainy day). It had been sitting in a pile mixed with a small amount of sand and what I estimate to be some rock salt spread around the range to melt the ice. Much of the brass has a green patina, as oxidized copper alloys generally do. I hand polished a few cases to test and they come out fine. Anyone have experience putting this condition brass through a vibratory polisher? Any damage to the brass or the polisher? The cost of ammo being what it is, I've become a bit of a brass scavenger, so I rarely leave anything I reload laying around. I just want to make sure that I'm not wasting my time. Thanks for any info.