Fixing my rusty rocker panels is my first body work project. The only online places I could find replacement 2-door rocker panels was Raybuck & LMC, both are $40, but LMC's shipping is cheaper by about $2. I called a local place and they said they don't have anything. So I just received my LMC "rocker panel" [which by the way is made by CHL Auto Parts (LMC won't tell you who manufactures their stuff on the phone)]. Anyway, I now notice the sticker on it includes the words "slip on". There's not a ton about this online. Are there really 2 different types of panels? Are Slip-On panels really meant to be put OVER the rusted rocker panels or is this just a poor choice of terminology like "slip-on exhausts" for motorcycles, Electra-Glide Harleys and "organic" food (I thought organic vapors were bad for you?) I went out to my truck, granted it is pitch black out, but it did seem like the panel fit nicely OVER the rusted sheet metal. I want to do this repair the right way. Am I going to have fitment issues if I cut out the rust and weld this panel in as a REPLACEMENT? I'm a noob, I really don't want extraordinary fitment issues. Seems like I don't have much of a choice, since I'm banking on the Raybuck panels being the same exact thing.