Another part and info source along with youtube, it's fairly easy to do. Research well
http://www.dinzagarms.com/index.html
http://www.mississippiautoarms.com/
I've tried this with a couple of my pistols and imo it mostly smoothes the action of the pistol. I've heard guys going full auto, never seen it but they may have ground parts rather than polish. Some of the aftermarket connectors come polished if you look close.