Mother's is the stuff. It works great on chrome but on bare steel, zinc, and aluminum parts I usually polish with rubbing compound first and then put mothers on last as a final polish and also to seal it up against moisture & corrosion. This works great on aluminum parts that have lost their lustre and no longer have any lacquer on them to protect them from turning a dull gray from oxidation.

I just did a pair of Weinmann's yesterday stamped 5th month of '78 and I daresay they look better now than they did when they were new.

The only way to get them shinier would be to use a buffing wheel and clear-coat them to keep them from surface oxidizing again.