am looking to buy this Lizardskin and I have previously bough quiet ride solutions as a double insulation can I install it on top of itI used Lizard Skin - both the ceramic thermal insulation and the sound deadener. It sprays on very easily - just make sure you mask everything you don't want sprayed since the stuff tends to splatter a bit. I have dual 2.5" pipes running through the tunnel and I am also running catalytic converters and the temperature in the car stays very reasonable. The only place I notice any heat coming through is around my parking brake handle (my handle is a center mount on the tunnel). The body has a very solid feel to it - no tin can sounds at all. The roof sounds amazing when you tap on it. Just a nice dull thud instead of a hollow can sound. I sprayed the inside of my doors and they sound nice and solid when I close them.
Here's some pictures: