jOe
I've used an automotive brake cylinder hone to polish chambers and clean up mild pitting in barrels (it smooths and polishes that sort of sugary surface you sometimes see located just after the forcing cone). As long as you weren't looking for a whole lot of choke a brake cylinder hone, with coarser stones on it then what I've been using, would be great for what you just described, and easily accomplished as well simply using a power drill. SDH, I think you're making the process harder then need be.
BTW the chamber I polished was on a new Remington 870 Express. The factory chamber was so rough that shells would occasionally stick in it. After polishing with the hone there were no more problems. Yes I probably should have sent it back to the factory, but then I would have been without use of the gun right at the beggining of hunting season
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Steve
