One too many burnouts! Just try not to let it sit onto the paint for a while, before I got my 10th after messing around in the GT. I let the rubber sling stay on the rear bumper a little too long and it etched into the paint when I removed. I am sure a nice compound applied with my griots would of fixed it but just a heads up.
Anyways, CarPro Trix works wonders! Give it a try. I am sure others will have great advice here.