The carpet is actually plastic so when you melt it it is hard when it cools. No need to put the liner on because it leaves a very rough surface. I tried to put Herculiner on mine and it just balled up and wouldn't even go on. I wiped it off. Here's a pic.
When I sprayed mine with liner I just melted it with my heat gun and sprayed it with the liner. Came out great and matches the rest of the tub pretty well. You don't have to spray it after you melt it but I had leftover and though why not.
A forum community dedicated to Jeep Wrangler owners and enthusiasts. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, troubleshooting, maintenance, for all JL, JT, JK, TJ, YJ, and CJ models!