http://forum.earlybay.com/viewtopic.php?f=4&t=30891" onclick="window.open(this.href);return false;
Have a look at Bwuttonmoon's thread.
I considered doing mine and thought they would look fab when they are shiny. Then I remembered I used to do chemistry at school and as they are aluminium, all the polishing does is remove the aluminium oxide. And after a bit, the aluminium re oxidises and will go dull again.
So I didn't bother.
Hope that helps.