I'm surprised Mothers Mag & Aluminum Polish hasn't been brought up, but since it hasn't, here goes:
Before/After:
Both Finished:
Stuff is not expensive, and works wonders. Only way to improve it is to get a Mothers Powerball (Small) or Powercone, and use a screwdriver on low speed to work off the excessive stuff and save your arm.
And I have an F.I. exhaust as well Mark, so your will look just as good as these.
