Skip I don't know if this would work for you or not but reloaders use a little devive to clean fired brass cases with that works by vibration and different additives that you pour in a plastic bowl that has a motor on the bottom that makes it vibrate. It will polish most anything that you might want to put in there and the cost is not very much. You use corn cob or walnut shell pieces to polish and you add jewelers rouge to increase the grit as needed. You basically pour in the stuff you want to polish pour in the polish media turn the thing on and go do something else for a while till it's finished. You can also buy a little separator to strain your polishing media from your product so you can reuse the media over and over again to further reduce your cost of operation. Midway reloading products sells these things and they have a huge website you can go to and look at them to see if it might be what you are looking for. Hope this helps.......brim
A man is not judged by what he has done for himself but by what he has done for others.