I know that the paint system used on my bumper of my 2011 is base coat, clear coat. No issues with the color match. I had greater damage and the radiator core support had to be replaced. Good luck.
2011 GT 5.0 Premium 401a, MT82, Glass roof, Brembo, Comfort, 3.55, accessory trim 5 (scoups, flat panel, Pedistal spoiler) mods:
CS front valance with fogs & Roush harness, Roush side splitters, LMP sport hood, RTR rear valance, MRT hood struts, invisible bra, Corsa Extreme & X pipe, anniversary staggered wheels, Steeda shifter, Oracle LED halos, Ultra Silverstar.