About a month ago I dismounted all four tires, one at a time, scrubbed the barrels really well, wet sanded, and applied three coats of clear gloss.
While at it, I also applied two coats of Mequiars Sealant 21 to the outside of the wheels.
I am happy to report that the amount of brake dust that adheres to the wheels (inside and out) is significantly less.
Next I'll remove the wheels once again and double coat the barrels with Sealant.
https://video.search.yahoo.com/yhs/s...1&action=click

 

I've applied ceramic coating to just about all surfaces that would get dusty (body, wheels, and brake calipers) and it's helped accumulation dramatically. A sealant is a pretty good way of going about that as well.

 

Had my new wheels ceramic coated before install. Had brake calipers (re)done too.