msheredy - You and I have basically the same situation. I have a garphite Crossfire and my wife a silver (pewter) 04 Mercedes. When I wash her car almost no water spots can be seen because of the paint color, they are there just hard to see. My car on the other hand spots quickly if I don't get it dried off quickly. The only fix I know of is to wash in the shade or after the sun is out of the sky. Sometimes that's impossible. I always use my blower on both cars followed by a damp towel. With the amount of polish/Detail spray I have on both cars the water spots are minimal but they are there if the water is allowed to just dry on the car. There are water softener devices available that I am told eliminate water spotting but they are expensive. I'll stick with my Meguiars Gold Car Shampoo and my towels and blower.