Underbody Painting

Hey, I want to make my '02 FX4 Ranger look better and paint the rear whell wells and springs black. I was wondering if anyone had any pointers like what type of black paint to use, do I have to scuff anything or any that will stick without. Like I said, just want to make it look a little better and the black underbody will go good with the black paint job on that truck. Thanks for any help

There's a product that I see at auto swap meets called POR-15. It's supposed to bond to rough metal real well, takes alot of abuse, and lasts along time. A guy I work with is using it on the underbody parts on his 69 Firebird. He seems to like it. Just an idea.