I also used herculiner on the inside of mine, like mentioned before, it gets hotter inside but where I noticed the difference was the noise. The carpeting muffles the noise of the jeep so once the I lined the inside, it became alot louder inside.

 

I'd wait a while before you did the whole thing. I used that stuff on a truck bed a few years back and I was very happy with it, ....... at first. It was not durable at all, it peeled off alomst everywhere and I did sand and degrease everything before hand. I'd wait to see how it stands up on your lower panels before I did the hole jeep.

Herculiner is KICK A@@ stuff! It's as close as you can get to Linex without the price and the appointment.