It doesn't work great for anything, it's just what some might find acceptable. Just because you can't see what it's doing to your paint doesn't mean it's not causing harm to your paint.
If getting road grime/chemicals and dust off your paint is your main concern and you don't care if it's clean, you're much better using the wash bays to spray it down.
I wonder when it’s going to finally start causing harm to my paint…
Since I’ve taken delivery of my 2017 in February of 2017, I have taken through the touchless wash every day it’s not raining or snowing. That’s not an exaggeration. It’s been through the the wash at least 1300 times. I have no scratches or swirl marks, and it’s never been parked in a garage.
My truck is max steel metallic, and a co-worker’s truck is granite crystal. He’s all into dumping money on ceramic coating and expensive waxes. When we’re parked next to each other, I can not see a visual difference in shine and reflection between the two.
It always seems like the ones who claim they never have, or never would use a touchless car wash, somehow know about all this “harm” they can cause to the paint. Surely after 5 years and 1300+ washes, i should at least be seeing some kind of sign of this paint damage, no?