So the main thing I've been wanting to do to my iS since I bought it was to get the wheels in an acceptable state as they were absolutely hanging when I picked the car up. Hopefully this brief review will prove helpful and/or mildly interesting to some of you.
My brother had used wonder wheels before and rated it so I picked up this(http://www.halfords.com/webapp/wcs/s...egoryId_165682) kit (can be found cheaper elsewhere but I was in Halfords at the time).
I used it undiluted as my wheels were really bad but you can add a splash of water if you want. I applied the Wonder Wheel pretty liberally with the brush included and left it for a few minutes, then went back and gave it a scrubbing with the brush and then a second pass with a damp sponge. Once done rinse off thoroughly with plenty of clean cold water.
This was probably the dirtiest wheel.
It is by no means perfect but as you can see it is several orders of magnitude better than it was. The other three wheels came up just as well too, so I definitely rate Wonder Wheels for a good quality clean with little effort needed.
No full car pics as the rest of the car is filthy!