I always wonder this. Especially in the winter when it snows out. I use a local car wash to power wash my trucks before I hang wash them. I only use water to get the rough stuff off and then go home and bucket wash. Does using just water at these take wax or sealants off. I have heard the soap at these places will strip so thats why I never use then, but always wondered about theater since it's such a strong blast of water? maybe stupid but always wondered.
jim
jim