If you have a power drill, you can pic up a chuck and small, felt buffing wheel at Sears, or any other hardware store. I'd guess a $10-12 investment for the parts.
If you have a drill that plugs into the wall, go for that over a battery operated drill since the charge won't last long enough for the job. I tried with my cordless and burned through both batteries in no time. Then pulled out the corded Makita and ran that baby the rest of the day on full power.
Sorry, but this is the best shot of my wheels I have at the moment. Excuse the car, but instead of following Duz's no water wash method, I tried water and well...you see what happened...shrinkage...no guy likes at talk about that.
I did paint the center sections, but the edges are polished.
OK, so I first had to strip off the peeling clearcoat. I'll skip that since you don't need to deal with that step.
So if you are looking for a "mirror" finish, first check for any nicks. You will need to taper those nick edges via small, fine files and
fine sand paper. Working through finer and finer grit paper and very fine steel wool will get you a long ways there. Lots of elbow grease.
After you think you are pretty uniform, apply the rubbing compund of your choice. As I mentioned, I prefer Wenol now and it comes in different levels of polish for fine or ultra-fine finish. If you have Brasso already, go for that and see if you get the finish you are happy with. Wear eye protection and wear clothes you don't care about as the drill WILL sling it all over you. The drill works great since you can twist it this and that to hit the bends better than you can a bench-mount.
Wash, rinse, repeat until you have the finish you are looking for. I use Mother's aluminum polish to maintain the shine. I would NOT clearcoat the intercoolers since I am clueless as to whether that would creat any heatsink issues. We need an thermodynamics engineer to answer that one. If they say its OK, you can purchase Duplicolor's Wheel Clearcoat and hit them with that.
As for Brasso, I used that all the time to keep my cymbals looking seriously sharp. That stuff would take out the drumstick marks real well. Use in a ventilated area, or wooooohoooo. I have never tried it on aluminum, only brass cymbals.
