I would try harbor freight walnut hulls, either fine or larger. There are 20% off coupons all over the place. Link to fine walnut hulls.
This is a discussion on My brass turned gray while trying to clean it???? within the Reloading forums, part of the Defensive Ammunition & Ballistics category; Lemishine and Dawn does all you could ever want, the media does the rest....
Lemishine and Dawn does all you could ever want, the media does the rest.
I was always told that anything with ammonia does not mix well with brass. I still use corn cob, Turtle wax liquid, some liquid chrome polish, and a dollop of citric acid on my 9mm, 9x18, and .38sp. brass. Just switch the vibratory tumbler on and let it run till everything is shiny. Common knowledge is to use walnut on dirty stuff, coarse corn cob on cleaner stuff, and fine corn cob to get a high polish. I just use electricity and time with old corn cob and that mix that I add to it each time I tumble brass. It works for me. YMMV.
And it leaves the brass slippery enough I don't need any case lube for the sizer but not greasy so as to attract dirt or clump powder.
When you have to shoot, shoot. Don't talk.
"Don't forget, incoming fire has the right of way."
A 9MM MAY expand to .45 but a 45ACP will never shrink to 9MM.
I take mine out and roll em around on a towel. Donít let them sit wet. I am very glad I went to the wet tumbler.
Read our government's plan to destroy the Constitution.