Hi, I parked (well, the valet did) at HK Parkview on New Year's Day and some liquid splashed onto my car leaving stains all over. I washed my car with shampoo about three hours later and most of it on the paint and windows came off. But there were still some circular stains/marks left on the roof after repeated shampooing. I took the car to NTI this afternoon but that didn't help. I wonder if anyone on this forum has further ideas? The stains are difficult to photograph but I tried my best in the attached photo. Many thanks in advance!