Looked into having my slotted mags that came on the truck polished. Quote came back at $200. Per wheel. They aren't really that bad but they had some corrosion spots and ridges in the casting that don't look the best.
Turns out that you can do a pretty bang-up job with material from Harbor Freight tools, a DA sander and California Customs Purple Metal Polish.
All in all, I figure it will take me only a single day to do all 4 wheels at a cost of around $75. Not too shabby. For the finish, I 220 DA, 320DA, 400 wet sand by hand, use a buffing wheel with HF grey compound and then finish everything up with a second buffing wheel and the purple polish.
While I will go for a slightly better finish in the end, the right side of the wheel in the below pic is the result of the trial run I did today.
