I have done exactly what you did, but there was a line so my buddy and i said screw it and went through.. everything was fine until the top roller hit the lightcage on my roof rack.. the whole jeep jerked back hard and i heard a snap up top on what sounded like the carwash roller brush.. the wash stopped immediately and I left as quickly as possible lol. absolutely no damage to my jeep but I have a Conferr rack with a pretty robust mounting that mounts to the bars. I'm not sure about the damage if any to the carwash, I'm thinking and hoping that it was a protection that for just that, i drove by it the next day and it looked like it was still working so i'm guessing it was fine.
2001 Steel Blue WJ Laredo SA 4x4, 3.5" lift, Apperance Package with factory Laredo Steel Blue cladding/leather
Conferr Roof Basket with custom Randy Ellis Design light cage, WAAG grille guard and Hella lots of 500 lights
2004 Wrangler Sport, 2.5" and 31's, nothing special
"For all sad words of tongue and pen, the saddest are these, 'It might have been.' "
John Greenleaf Whittier