I was polishing a black Honda Accord with 1Z PP and PC yesterday when I noticed the polish was leaving stains where I blotted it on with the PC. Temp was about 48 with the sun shining. The surface of the car was warm but not hot. They eventually polished out after a couple applications. You think is the result of the sun shining on the black paint or is this a trait of 1Z polishes? Any thoughts??