Thanks guys!
DubFan - the first time round I only really processed the shots that were artificially lit, I think this is the only one without flash.
Untitled by
Chris Winsor AutoMotive, on Flickr
The base image I used for the edit I did a couple of days ago was actually one that was meant to be artificially lit but the flash didn't fire!
thatwillis - I can't totally remember but I think the final image had about 15 - 20 adjustment layers to it! I think the key is doing lots of small local adjustments rather than big ones on the whole image. The masking is a pain in the ass but its worth it. All main adjustments were either done in curves or levels, theres a saturation one in there somewhere, a low opacity multipy blending layer, colour balance and then also a screen blending layer at the end for the glow. The car and the background were edited separately until the last stages too. Sorry, that's probably not a whole lot of use!