Hi, i have asked an similar question in the car detailing forum of this site. I am new to this site, and i thought my question would be more suited here. But i was wandering if a waterless car wash can work on really dirty cars. I heard it may leave scratches or swirls in your car. Also, is there any technique or equipment that I could use if i start a waterless car wash business. I wouldn't want to turn down a car because it is too dirty. I am interested in starting one soon, and it would be helpful if anyone could recommend any products to use.