Looks like cracking to me, I had similar ones on the bumper of my GTP. I painted the bigger cracks and sanded them with 2000, came out decent but eventually I am going to get it reshot. For now, try filling in the ones that you can catch with a fingernail, sanding them and the smaller ones with 2000, and buffing out. Go easy on the buffing, its not too tough to burn all the way through.