OK - I don't have a buffer and I have stems that need cleaning. Yes, did the oxy bath - but now its time to sand and micro sand OR IS IT? In reading another post I saw someone mention a friend who uses an ultrasonic cleaner. That got me to thinking about my brass vibrator. Could I throw some cob or walnut hulls in it throw in the oxidized stems and see? I'll try it on a couple for varying lengths of time and see what happens. I just won a lot of stems off Ebay so I can spare a few if the experiment goes awry. Has anyone tried this? Anyone want to venture a guess on if it will work? It gets my brass super shiny, surely it can remove oxidation.