Restoration tip... The Bezels
 

This is for the guy's restoring the original parts.
I thought there has to be a way to "clean up and polish" the 2 bezels,
the ones for the Ignition/Key switch and the Ammeter. This is what I
came up with,...and it works good. I used a short piece of 1 1/2" pipe.
I filed the 4 notches for the "tabs" that hold both bezels onto the
panel, plus, the 5th notch the locates the Ammeter in the panel. The
notches locate, are shallow for a light press fit and drive the bezel for
spinning in the lathe. The 2 that I did are junk due to dings in one and
a crack in the other,...I didn't know either one was bad till I cleaned up both. I was using a Scotch-Brite pad for the cleaning proses.

Re: Restoration tip... The Bezels
 

You can also use a soft toothbrush and toothpaste to do this as well.