well about 3 months ago i was driving about 2 miles from my houses when some crack head hit me from behind. The bumper just had a hole in it . So I got a new bumper put on and painted the guy did a really good job but I guess theres little overspray dots on my rim and alittle on the inside of the trunk. Its kinda of like powered? Now heres the werid part it goes away when I wash or wipe it down but the next day Its back. What could this be