I just happened to catch this posting about Truck Washes and damage done. I feel for the RV owner that has damage due to the washing, there's no excuse for obvious damage due to carelessness. I have seen the truck wash signs whilst driving the highways and have almost gone in, but never did.
Just this week, I opened the Winnebago massive - manual to my 2016 RV. I learn something new each time I open it up; this time and it coincides with this post - the manufacturer makes it very clear not to ever visit a commercial truck wash. Their reason stated is that the high pressure hoses used can damage the paint and other items on the RV. There is so much to learn about RV ownership, with the help of on-line posts, YouTube videos, books and blogs, one can come up to speed in due time.