This brings back memories. My dad was a car freak, so when I got my first car, he made me wash it all the time. Even worse, he liked to tell me what I was doing wrong, or which spots I missed. Simple Green was one of the products that we used. It works perfect for getting those white letters on sports car tires to shine like new. We also used it to scrub the floor mats down to bring them back to the original color.
It really is a great product and it will clean anything with the right amount of scrubbing and obsessive compulsive supervision!