Hello, A Golf Plus has been parked under Carport for years with ivy hedge and lateral visual protection by ivy hedge. How do I get the coating off the paint, which was created by pollen dust. Gestures cleaned in the cleanpark and the dirt does not go away. Looks like a lime layer? Car stood there unused for half a year. Even on the side windows and goes only way scratching with fingernail Does a lime cleaner which is briefly applied and rinsed?