[johnwill]

I find I get excellent results with the felt bob that is about 1/4" in diameter and has a point. I use the Dremel polishing compound and have at it. Although the polishing compound won't take metal off quickly, it will take it off, so use caution! I do a little polishing, then wipe it off and check the result, then a little more polishing. You don't want to change the shape of the feed ramp, just smooth it. It's also not necessary to make it glass smooth with no flaws, just smooth to the touch. It's a mistake to try to polish every flaw out of the feed ramp, and you'll likely end up doing more damage than good if you get carried away.