I used a nikon (ftl) sb800 to light the car, it has that cool painting with light button on it, so I use that at a very low power to sort of fill in the car with light. I missed a few places as you can see though. Black wheels are a hard thing to do, either too much or not enough light it seems.
Usually though, as acab pointed out I use a mix of different heads and use a lot of power but with a big distance. I swear I do everthing different to everyone else