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This is interesting to me ..

I've used ultrasound machines for small parts .. you know .. the small ones that jewelers use. With that and a toothbrush, I found I could get pretty far with clean...

Many moons ago I used to do alot of work with metals for a living. I used a buffer almost daily. A bunch of big buffers, IIRC. The smallest was about 3.5 hp and the largest buffer was around 16 hp....