Well for anyone who's curious I faced these parts just now with the cutter I said I was going to use. I had 4000 RPM and a Feed of 2.0 ipm. The finish was mirrorlike and there weren't any bad burrs. I took passes at a depth ranging from .010" to .005" and they all came out great. Too Be honest I probably could have upped the feed by a lot but I figured if it ain't broke don't fix it, since it was just two parts.