I tried searching, but I just can't find what I am looking for... 
A friend of mine left his new truck with me for a few months to get a few things done. One of those things is a spray-in bed liner. My questions are: what is under the factory plastic bed rail covers? are there holes in the metal bed rails for mount clips? If I spray under the rails, do the plastic covers age well? (warping/cracking)
I am new to the "new" dodge truck and have a short list of modifications to get done, so you may see me pop up here and there. Fortunately I am no noob to forums and exhaust searching prior to asking.

A friend of mine left his new truck with me for a few months to get a few things done. One of those things is a spray-in bed liner. My questions are: what is under the factory plastic bed rail covers? are there holes in the metal bed rails for mount clips? If I spray under the rails, do the plastic covers age well? (warping/cracking)
I am new to the "new" dodge truck and have a short list of modifications to get done, so you may see me pop up here and there. Fortunately I am no noob to forums and exhaust searching prior to asking.