38D

Ok, I admit it. I haven't washed my wheel in months. So I go out last weekend, and man is the brake dust is on there tough. So far I've tried P21S, Brake Cleaner, and CLR. Nothing works. The only thing that works at all is paint cleaning clay, but even that takes forever (I spent 1.5 hours and cleaned 25% of one wheel). Any suggestions?

ltc

In almost 2 years of Cayenne ownership, I've only washed mine twice, so you're way ahead of me. I guess there is an advantage to considering your Cayenne to be a POS and unworthy of the cleaning the other Porsches get

Try P21S Total Auto Wash, straight out of the bottle, no dilution, sprayed onto a dry wheel, let sit, scrub, repeat. It is citrus based, so it is clearcoat safe.

For remaining tar, Xenit, Tarminator, 3M makes a good prep solvent, etc.

38D

I've actually already tried that...nada.

ltc

OK, then how about this, Oil Flo Safety Solvent:
http://www.3eshops.com/default.aspx?...mID=B00064GNZG

Works very well for removing wheel weight adhesive.

BTW, are these OEM/clearcoated wheels?

24FPS

i'd pull 'em off & scrub w/ wheel cleaner for clearcoat wheels & soap.
try pre-soak in wd40.... may even have to use a green plastic (scotch brite) pad & bon-ami------------- stuff has got to be baked on there.

...sad.

Sammamish

Have you tried P21S gel stuff and let it sit for a while?
Also, when my wheel is cleaned overall, but if there are little black thingy refusing to come off, I've used claybar to take them off.

38D

I left P21S on for 15 minutes. Did nearly nothing. The only thing that has worked has been the clay bar, but man is it hard work. I literally spent 1.5 hours, and am only partly done with one wheel...and there's still stuff that won't seem to come off.

DTampa

Once you do get them clean, put a couple of coats of Rejex on them. I can clean mine by just wiping with a dry rag and everything comes off.

You might try Simple Green and let it soak for a while.