The brush that comes with the Wonder Wheels kit works a treat, did my wheels today and they came up well :D
 
Have got that one, but I think you will find it is corrosive acid in the fluid that does most of the work, but eventually screws up your wheels!
 
Yep, thats why i try not to use wheel cleaner too much lol, but these damn roads are harsh on them :( not come across a better brush yet tho, other ones i used on previous cars scratched the wheels :(
 
Not sure about a brush but if you use a decent sealer on the wheels the dust just comes off with a bit of water.

If your after a wheel cleaner I find the bilburry stuff very good :)
 
i use a dish washing brush from wilkos lol, its perfect to get in the tight spots and its not to harsh so it doesnt scratch. majority of my brake dust comes off with the pressure washer once its gone just keep on top of it and it should come off fairly easy. ive always been told to sty away form alloy wheel cleaners as they can do more harm than good.
heard wonderwheels was a good one as it didnt have much acid in it. cant say ive used it much tho.