So, I had this box of various brass kicking around the basement for a couple of years. I finally decided to do something with it. It turns out to be a good amount of some 7mm & 300. Enough for me to clean and sell. I sorted it all out and threw it in the tumbler with some Lyman media. I left in for hours. When I checked it, it was still all tarnished and dirty looking. Hmm. I figure ill try and clean in my new sonic cleaner. I didn't have any of the brass cleaning solution so I went online to order some. While online I came across Cabela's corn cob media with polish. I also found that if I wanted to sonic clean I needed to de-prime all the brass. Well it was a rainy day yesterday so off to Cabela's we go. Went to the E. Hartford Ct. store. That was a big disappointment. They (Bass Pro) are driving that store onto the ground. No more Bargin Cave, Prices threw the roof on a lot of things, they even put in a toy area,really disappointing. Any way's back to the brass. I picked what I needed, some reloading components along with a box of the Cabela's corn cob media kit ( 15.99 ) and some sonic cleaner brass cleaner to have. As soon as I got home I loaded up the new media added the right amount of polish and loaded it with some brass. I let it run for about 2 hours. Well I have to say, I was impressed. The brass looked new. I don't know why the Lyman media didn't clean it this well. I even tried adding cleaners to the tumbler with the Lyman stuff. So if you are in need some new media, I highly recommend the Cabela's stuff.