Rust-Oleum Truck Bed spray Bedliner. I removed the skid plate, did a quick light sand just to add some grit, cleaned off, and dried it. Once dry, i sprayed it with a couple light layers of Rust-Oleum Adhesion Promoter. After that on to the Bedliner spray. Just do light coats until you have full coverage. And let it dry between coats and once you are done according to the directions on the cans. I am in no way an expert at paint, so if i can do it, anyone can. And to be honest, its under the truck....so no one is going to be looking as close to it as if you were painted the side of your ride. As for the part of the other small upper section that is also gray and kind of connected to the bumper, i didn't remove anything. prior to putting the skid plate back on, i just masked everything on the front off and sprayed the small section of gray that is connected to the bumper while it was still on the truck.
here's a picture i found with the front masked off
I really like this stuff, i have sprayed my side steps on my Jeep Wrangler. I even used it for the inside of my hardtop on my jeep wrangler as for some reason Jeep thought it was a good idea to make the inside of the hardtop white(which stays dirty and just looks bad compared to all the black and gray that makes up the interior). here's a picture also of my wrangler hard top that i painted with this stuff.
