I'm saying I've gone there over a dozen times and there are no scratches on my car. I'm sure it's not the best for the clearcoat but neither is leaving a layer of salt on my car all winter.
They must clean the brushes often then. Good for them.
It's often not the brushes that cause the damage...it's the grit from the car in front of you that gets slapped on your car right afterward.
Nope, my cars filthy and i dont really care. Im not anal retentive so i dont mind my car being dirtbag filthy in the winter really. Summer time is a different story. Ill wash it more often.