Haven't tried ceramic tumbling media in many years. It will clean quickly but leaves a dull, matte finish. Too aggressive for case cleaning. I guess if one tumbled long enough it would remove some brass, but I believe that would take days. I do use hard resin media from Harbor Freight (3/8" pyramids) on some applications but not 100% for brass. I use it straight for derusting, descaling tools and metal parts, but I will also add some to my corn cob blast media for cleaning cases, mebbe 10-15%. This with a bit of auto wax cleans quickly, and will shine up brass if one wants.