We had a good snowing and salted roads(for my area) and I was in a time crunch with a broken pressure washer, so I took the truck through an automated car wash. I knew it was a bad idea, and even though this was the first time I took the truck through one, I went against my better judgement and....well take a look.
How bad is it? I used some Meguiars Machine Glaze by hand to sample and it removed the majority of the issue.
I'm assuming this would be a good excuse to finally invest in a machine polisher.