There is a whole section in this thread on car paint.

http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2722867

You can also get car materials here:

http://www.renderosity.com/mod/freestuff/index.php?user_id=305980

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi