I suggest you do a test spot in a hidden place with any sort of "scotch-brite", scrubbing, steelwool type device... you may not like the matte-like finish that can occur with too much elbow grease.
I prefer Mother's Metal Polish and CLEAN soft cloth. It takes some time but there no chance of scratching or dulling the metal surface.
When you get bored, try some Mothers on the brake pedal or clutch/brake levers... makes them look like chrome for a week or so - aluminum starts to re-oxidize immediately.