I will never understand why people want to reduce the ammount of light coming from your brake lights by tinting them. In todays world of distracted drivers I want red strobes for brake lights.
Anyway, most likely you will need to wetsand with 2000 gril paper and then buff them shiny. Best bet would be to go get a headlight polishing kit and go to work.
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03 GT, STB, GM HD sway bars, 35% tint, GE893(37watt)fogs, Flowtech Terminators, 180 T-stat, ZZP DP & PCM, Ceramic PLOG & Crossover, 18" glasspack, 2007 17" Mustang Bullits 235/55/17 Pirelli PZero Nero, 12" R1 D\S rotors, gutted air box, GTP radiator