spraybomb
+1y
yeah, it kinda looks like they used a mild abrasive to take off the lettering. A good cut and wheel should make it shiney again.
Wash the truck then hit it with a wax and grease remover.
Wet sand it lightly with 1200 or 1500 grit paper. Stay away from the edges. Factory clearcoat is really thin.
Once its sanded, you shouldn't be able to see the sticker marks anymore. Wash away the sanding residue and start buffing.
Wool pad with some rubbing compound, then foam pad it with some swirl mark remover. If you still see small scratches on the surface, you'll have to go back to the wet sanding to get rid of em. Once you're looking sweet, hit the surface with some wax to protect it and you'll be good to go.