I just did the brass thing and it worked great. I just used a little dawn dishwashing detergent with it. I put every thing from 9mm to 50bmg in to test it. Some was dirty range brass and some farily clean. Abot an hour and a half it was like new clean. I used a RCBS sidewinder tumbler. I got the brass media when I was in town at H&H. I didnt think clean up was as bad as regular media.