I bought a used Frankford Arsenal Rotating Tumbler both because I found it used at a good price and because buying and owning a FART makes me smile when I think of it.
I still tumble some brass after wet tumbling in dry media with a dash of mineral spirits and some Nu-Finish wax for long term storage. For those who don't want to take on more equipment (weird but I guess someone out there might not drool over new tools and such) A simple 5 gallon bucket and some lemi-shine or other citric acid bath before putting in the vibrating tumbler with dry media can make a big difference in how the brass comes out.
Too much citric acid or sitting in citric acid too long will turn brass pink. Removes the surface zinc I think it is and leave the copper so brass looks pink. Overnight is a big no-no. I generally stay at less than 3 hours and less citric acid than you think you need. A couple of spoons worth dumped into 3 gallons of water works fine.
The wet tumbling gives me clean cases inside and out with clean primer pockets. I presume cleaning those areas will reduce or set back tarnishing and corrosion in those areas. Having brass clean inside and out is a win as far as I'm concerned.
I have a window box fan. I set it pointed at a towel on the floor. I dump brass there. Come back later brass is dry. FART has a grill end piece that allows me to shake the pins and excess water out of the brass.