I suppose it could scratch the paint. I will pressure wash it with a foam gun and let it soak most of the top sand off then rinse it with the pressure wash and hand wash it with a microfiber mitt. That is really the best I can do, but honestly this is the first sand storm I have actually driven in, so I will have to get back to you on it.
I think as long as nobody pushes it in the paint, you know like wipe "Wash me" in the paint, I bet I will be ok. I do keep it washed and waxed for the most part, so I do think I will be good.