Anyone come across this before? I've not had my car washed for approx 3 months which may have been the main contributor to this. Mostly around the door trim and front wheel arches.
It could just be tar deposits on the paintwork. My other half has a white Tiguan and it's a nightmare for it, looks a browny yellow and even rusty in places but it just comes off with a good clean and a decent tar remover.