Before you wax you should decontaminate your car's paint. Turtle Wax comes to the rescue with their new Ice Clay Kit

After washing your car, one of the best ways to ensure long paint life, good shine, and maximum wax adhesion is to "clay bar" your car's painted surfaces to remove the various contaminates you get with everyday driving. To make things easier on the DIY car detailer, and provide the most protection for your paint, Turtle Wax has combined their Ice liquid clay bar with a standard clay bar for the new Ice Clay Bar Kit. Using both products together will give you the cleanest surface finish possible before waxing, and help contribute to a deep lustre shine.

For more info check out the Turtle Wax website, http://www.turtlewax.com/main.taf?p=2,1,1,4