I used to take my Rav4's through the local IMO car wash, making use of the unlimited wash club for years, and never noticed any particular damage.
BUT, when I got my model 3 - things were going to change! I spent over 3k on front PPF and Ceramic Coating all over so I'd be damned if I was going to risk damaging it at that nasty old drive through car wash!
I spent about £200 in halfords....buckets, snow foam sprayer, the works and every single week I was out there, diligently following the 2 bucket method videos that I had seen on youtube. I even risked flooding the house by fitting an outside tap at the front (which had to be fed from the back) so that I could run my jetwash easily.
Then it started raining a lot.
Then it got really bloody cold.
Honestly....after just a couple of days with all the salt on the roads, it looks like crap again and after a 60 hour week with only 2 days off....I just don't think I can be bothered anymore with the hassle of washing it. I did try once or twice to get away with a quick snowfoam and jetwash rinse, but our water is SO bad that it ended up leaving more chalky spots than ever, but when its hammering down with rain, what do you do.....
Seriously considering firing up the ol IMO membership again and using that, although my local seems to have changed management/staff and they are not as friendly as they once were.