Mostly what is sold today are white stick-on "decals". These look ok when you apply them, but if you live where the summers are hot, you'll be better to cover the white decals / rest of the tailgate with a layer of clear catalyzed urethane. Once upon a time, an adhesive stencil sheet could be bought from GM, but that hasn't been available for 30 years or so. It was pretty neat. All you had to do was carefully apply it, mask around it and spray white or whatever color you wanted.
