Rain-X has a car wash soap called, " Rain-X Dry Magic Spot Free Car Wash." There is a Z3 on the bottle. It states that there will be no water spots after washing. Anyone tried it before?
I've seen it a couple of times, but i'm not really a believer with all that "dries without spots". I'd much rather take the time by running a stream of water (no hose) over the car.. letting the water sheet, use the California Water Blade, and follow with a MF towel.
I have a bottle and use it often. However I will assure you that if you don't dry the car afterwards you will still have water spots just not as many. I mainly just use it on detail jobs I do for friends and family it makes the job a little easier and it suds very well.
