Paint the lower quarters?

[metal chevy]

Hey guys. I just bought my 82 a couple weeks ago. The paint is super faded and on the passenger side there is some primer spots, eventually i will be painting it. But for the time being, I was thinking i might paint the lower quarter panels below the trim with some spray on bedliner. I did this same thing with my Cherokee and it looked super good, alot of the Jeep guys did it. Theres more surface thats gonna be painted on the truck, and thats what kinda holding me back, I dont want it to look ****ty. Has anyone done this? Ill post a pic of my truck and of what im talkin about on my Jeep.