I bumped a thread on plastidip on here for you
I did mine at the worst time - very bright sunshine and an extremely hot day. I couldn't really see what I was doing and it was drying too quickly. But they turned out fine!
I used 2 cans for all 4 wheels but I would have used a third can if I had time. Take the wheels off and make sure they are clean and very dry and you can't really go wrong. I didn't bother masking the tyres because you can just peel it off once it's dry.
One thing I did notice is that the cans are much better kept upright. If you hold them at too much of an angle (like you would get away with on a normal rattle can) it spits quite a bit when it's getting low.
Have fun!