After you've spent a day washing and waxing your pride and joy, you look forward to giving it that final stroke: when you run your hand across the freshly waxed paint, just to feel how smooth it is.

Ever wonder why no matter how often you wash your car, it’s never felt as silky smooth as the day you bought it? Because over time, airborne contaminants such as brake dust, overspray, tar, and tree ...