I just recently changed from walnut media and jewelers rouge to Flitz Liquid Tumbler Media Additive and corn cob.I'm very happy with the results,clean,clean brass and no residue inside or on the outside of the brass.Removes: Oxidation, Tarnish, Lead Buildup and Fingerprints. Will not Harm ANY Metal. Will not Deaden the Primer. Will not Stress or Imbrittle Brass. No Ammonia. No Buildup. Cuts Tumbling Time in Half.
http://flitz.com/:) I believe Sportsman's Warehouse,Cabela's and Midway all carry the Flitz Cleaner