There is a great DIY write up on how to do the Renegade black out headlight bezels over on LOSTJEEPS. It shows you how to remove them pull them apart, spray the bezel and reassemble. I believe it is during the pulling the headlight apart that you bake (or heat in your oven) to heat the adhesive holding the headlight housing together so that it can be pulled apart.
I will PM you a link to take a look.
"If you have a difficult job to do....Give it to a lazy man....He'll find the easy way to do it."