sanding

Ever since I got my jeep I've wanted to paint it desert tan down the line and now I'm getting some really bad chipping and peeling on my hood, so at the very least I'll have to sand that down and paint it. So that got me thinking about just doing the whole thing along with the hood. I'm really...

I’m guessing it’s a weatherproofing of some sort. I’m about to sand the tub to apply Raptor liner. Does this stuff come off? SHOULD it? Or scuff it, use etching paint and then Raptor bed line it? Thanks ,