1st things first, eliminate as many reflections as possible.
Get yourself a circular polariser and a tripod. Take multiple shots of the car with the filter in different positions. If you find that it doesnt help eliminate every reflection, look at where each flash is placed. Ideally you want them in the corners facing up. The 7 looks better than the X5. The exposure seems a lot better.
The rest of it is just going to be dodging and burning in Photoshop.