Washed my car as normal and rinsed off with low pressure hose, chasing the suds off the car. I didnt take a long time to do this and immediately towelled the car down, but was left with spots all over the black paintwork where water drops had dried. These literally felt rough, like they were a deposit of limestone/chalk from hardwater. A wax didnt remove them, quick detailer partly did but I think I may need to repolish now. Is there any way to prevent this or a quick way to remove the spots? Or shall I move house?!!!