I left my car overnight for one night of valet par...

I left my car overnight for one night of valet parking for $49 per night. The car was returned to me with a huge chemical residue splattered on the hood. I was tired and in a hurry so did not address it to the hotel then, but it's left a permanent stain on my car's paint. Yes, I should have brought it up immediately, but for $49 a night I should also not have to deal with something this ridiculous. It seems to me that this has happened before, it was a significant amount of residue, it cannot be the first time this has occurred at the hotel's lot.

Update: July 26,2017- No one has been in contact as your reply states.