I'm not really sure on the logistics of doing the roof...not something I can take off and pop in the conservatory!
I agree a white or black car would probably fit much better. In fairness the on car photo, which was taken in the dark on my blackberry, doesn't really do it full justice. I should really have taken and posted a day time picture.
I would love to attempt a a whole car but I don't see many people agreeing to let me have a crack at it.