i am totally pissed about this. I had to park one of my car outdoor for couple of hours and the car looks just like that now. I am going to have to wash the whole car down. But on the positive note, i will strip everything off and do complete swissvax system on it. Which i have been meaning to do but now forced to do.
The closest solution that has worked for me but still sucks as it takes time. One of the cars have OptiCoat. When this happens all i have to do is rinse the car off.
All in all as others have said - welcome to Spring time.