This is a a project that is quite old, but this summer I had some spare time to finish the modeling, and to light it properly. The carpaint I got from from the material lib (BbB).
There are still things that I could have fixed, worked on, and so on, but I needed to draw the line..
The light setup is simple enough. Several meshes lighting up the model, on the inside of a "bowl". I never checked the render times, but i think it's around 10 hours on my Q6600 using bidirectional. It was the car material that really saved the day. I've been struggling to find a good material for ages, and then tested out some of the carpaints in the matreial lib here.. BbB carpaint worked great! After all, I prefer to model, not tweak materials