The ones you see are aluminum or steel and actually chromed from the factory that come that way. Polishing is not something people actually do.
You can sand down a cheap pot metal part, but it will just look like brushed metal and it won't look like chrome.
If you really want to do this, you need to progressively get to finer and finer sandpaper and use plenty of water with wet n' dry sandpaper going from 400 grit all the way to 1200 Grit and higher.
Last edited by SHÖCK; November 3rd, 2009 at 02:44..