I've lost track of the thread on making your own tumber. Are
there any plans on the Internet?
I don't know how well this will work for jewelry, but for cleaning
spent cartridges we used to put the shells and media into a heavy
plastic jar and run duct tape around the lid to seal it. It then
went into the cloths dryer on fluff. They came out nice and bright!
Spike Cornelius Portland, Or. RC ArtMetal