Re: After Tumbling...
I use untreated walnut media and when it gets real dusty, I'll add a few small pieces of wet (with water) fabric to soak up the dust. Once the media gets dirty and no longer shines the case, discard it and get new media. Media is cheap and the new stuff works great. I also have two sets of media. My clean new media for cleaning fired cases, and another batch of media that I use for tumbling case lube off. This second batch is used clean media. Since case lube cakes up, I don't want to use my good stuff for case lube.
Also, don't over tumble. When I over tumble, the media wears out much sooner. My tumbler takes about 6-8 hours to clean about 100-150 cases. Any longer and it gets really dusty (I've left it running for 24 hours once).