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@BrickMan
^^ that sounds massively dangerous. Would never advice bolting an item in teh chuck of a machine unless you intend to turn it! For exactly the reason of soft cloth getting inwound in it and taking arm off.
Instead just use a bench grinder/mop wheel, polishing/grinding is exactly what they are designed for! Worst that can happen is you get covered in grit, and the item gets ripped out of your hand into your shin, you might get bruised, but you'll survive!