Semi-chrome is my second favorite finish for Bakelite. My first favorite is Flitz, My third favorite is Brasso.
Flitz in my first choice because it is simply cheaper and easier to find here than Semi-chrome. Flitz can be bought on the cheap at the grocery store. Semi-chrome here comes from the Harley Shop and they are proud of it. Brasso works well, is easy to get, but makes the pen stink for days.
In a pinch, Never-Dull Aluminum Wheel cleaning pads work well, just do NOT let the "wool" get wrapped around the spinning pen blank.