You know.. I must be getting a special version of all this wheel cleaner you guys use because it doesnt work worth a crap for me without running over every nook and cranny with a brush. I can use Wesley's Bleech White and do the same thing to rims I can using any other kind of rim cleaner.
Far as the whole "Sealing them and they're impenetrable!!!" statement, Ive been putting Collinite 476 on my rims and I cant tell it does squat for keeping them clean or making them any easier to clean in the future.
After buying my Mustang Saturday before last, I brought it home, cleaned it from top to bottom and sealed the rims with 476. 3 days later they looked like crap. Got the brush out, scrubbed them down again and 4 days later, crap. I broke down and bought some Kleen Wheels.
Kleen Wheels wasnt my first choice but Ive never had any luck keeping my rims clean on any car... my wife's Redline Vue being the only exception. I think rim design has a lot to do with it and the more intricate the rim is, the more places for crap to collect.