The charger I did was done from firewall to tail lights Roof and doors. The trunk lid was not done,but should have been sprayed before paint). Lizard skin is a ceramic style paint we used for heat control. "microballs" were added to help in sound control that was not included in the heat control lizard skin kit(they were in the older version of the sound control kit , but call to make sure they still are.). They do make 2 distinct products one for heat and one for sound. If I could do it again I'd shoot heat control(ceramic spray) in the cabin of the car and then go over it all firewall to tail lights,roof and doors with their sound control (water based high-grade acrylic binder with sound-damping particles). but your talking big dollars for that kind of result. much more than what my 66 dart is worth. now my other challenger just might get that treatment.