My car and the other car parked along the curb on the same street, then a second car tried to squeeze into the tiny space between my car and the other car. Due to the lack of room, the car in the middle seemed to scratch off the paint sealant on the bumper, making that area look dull. Luckily the paint was not damaged. Do I need to bring my car in for doing the paint sealant again? Is that any way to fix that by myself?