Originally Posted by Jeff Wills

Not much. Maybe make a little shinier. If it's "brushed" , you need to work up to "polished" in stages. That means progressively finer grits. If you want to attack it, go to the local auto parts store and get some red rubbing compound and white polishing compound. Go after your frame with the red first. Use lots of rags- old t-shirts work well. Expect to make a mess. Follow the red with the white. Expect more mess. Follow the white with the Mothers. Expect to be locked out of the house because of the mess you made. You'll be homeless, but your bike will be shiny.