My friend owns a customized 1957 Buick Riviera and was asked to use his car in a unique photoshoot. It seems they use a modern time exposure technique and paint the car with light. (sorry for the low resolution)
Here is another one using the same technique.
And another:
It takes a few hours, but it makes the car look like it was 'painted'. This photographer offered copies printed on aluminum sheets. I'd love to see some Shelby's like this. Very cool!