This stuff is amazing! It is literally a spray on-rinse off deal.
I have white Team Dynamics Pro-Race 1 wheels and Axxis Ultimate pads in Stop Tech calipers, and the wheels get very dirty. I was Google-ing "wheel cleaners" and came across a You Tube video of this product. After watching the video, I ordered a gallon. It arrived yesterday and I tried it out today. As per the instructions, I mixed it 4-1 with water and sprayed it on the wheels and tires. Let it work for about a minute and sprayed it off. 90% of the crud just washed right off. The rest comes off with a quick swipe of a towel. I wish I had taken some Before & After photos. I will next time.
It's a non-acid cleaner, so it's safe to use on painted, plated or bare wheels.

http://www.flashwax.com/wheelcleanerpolishers.html

"Try it, You'll like it!"

Jim

Disclaimer: I am not affiliated or connected with this company. Just a VERY satisfied customer.

 

I've recently come across info on this product and am going to be purchasing myself. I actually came across it by looking up Sonax wheel cleaner which happens to be another great product (what i hear). This costs less and does the same, if not better job.

 

Should be getting my 1gallon of Brown Royal and Aqua Gloss today. I'm going to wash the car this afternoon and take some shots and video. I purposely let me car get filthy so i could see how well this stuff works. Well, that and it's been too hot to do anything to it