I have considered a form of skid plate for it. Would probably tie it into the rear bumper, not sure if it really needs it though. The box is even with the bottom of the bumper. May add it at a later time. I have considered line x, honestly I like the looks of powder coating better. If I was leaving it as an open floor I probably would line x it. Since I will have my fridge slide and smaller storage box mounted the floor itself wouldn't see much action. I'm going with a textured satin black.
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