In the garage
First attempt at this kind of thing.
The car was in a garage with very little room for maneuver. Set up the camera on a tripod in the doorway at the back of the garage. Shot at f8 1/200 to keep out any pesky ambient light.
Hand held a snooted 430exii and fired teh camera and flash using a set of phottix atlas transceivers. Took about 30 images but only used 20. Combined in PS, masked and blended and finished off with some contrast and sharpening.
Quite pleased with the end result but need to plan the indivisual shots better next time to get better joins between the lit areas.
Set up shot in the comments