[porscheguy9999]

You would think so and I'm no expert so it very well might be just that simple. But since you add salt to the water to soften it, then it shouldnt be as hard as say, hose water which wen it dries, leaves waterspots if your not using soap. And if your not using soap to wash your car, find the nearest blunt intstrument and hit yourself with it until you can no longer see straight.

But I digress. Since the water is softer, as far as I can tell, it shouldnt cause harm to the car. Because the concentration of salt is low enough to not create a problem. But I would reccomend for good measure to take it to a professional carwash or use something like the Mr. Clean Carwasher because it filters the water, making the need for salt to soften it obsolete. Just a thought.