It is becoming very popular to wrap cars in vinyl rather then painting it the old fashion way. I found this article over at bimmerpost.com. The owner decided to try to wrap his car in vinyl himself rather then paying someone to do it. He found that for a small fraction of the cost for a new paint job he was able to successfully change the color of his car. You can check out the article including all his tips @ e90post.com

I have wondered what what the differences would be for different size wheels and tires. I knew that increasing the width can easily increase grip. Check out this test that car and driver did with a VW Golf.
Caranddriver.com/features/10q1/effects_of_upsized_wheels_and_tires_tested-tech_dept