Rhino lining/Line-x the bumpers?

I have seen postings in the past of a few people using a line-x type product on the sides or bumpers. I'd like to do this on my X, just to the bumpers, front and rear, and the bump guards on the door. Anyone have any good pics, or reasons not to/ to do etc? Obviously resale is to be affected but I don't care about that. (now haha)