Don't plasti dip the tips... You can take them off and get them blasted/polished or just get new tails.
At any rate, your car looks a MILLION times better man, awesome! Time to update your avatar. Also a good claybar on the whole car should really shine it up and I'd be willing to bet that scoop mark leftover will go away once you claybar and wax it.
2000 Mustang GT Steeda build #48. Bolt ons, suspension, Novi 2000.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.