I taped scuffed up and washed my rear black trim (bumper plastic, etc.) as wel as the running boards, plastic cowl under the windshield, and the black plastic cover over the radiator, taped everying off and shot it with rattle can Krylon 1613 semi gloss black paint. Secret is with this stuff is to dust it on (first 5 coats). It will never chip. Made the truck pop.
Still need to do to the front bumper plastic.
Another thing you can do is to sand and buff your faded headlight bezels. It's a PITA to pull the grille out and replace the lenses (like I did).
Another fun thing to do, if you're nuts like me, is to detail out the front suspension a bit and the undercarriage that shows (4x4s mostly - are higher) with cast rattle can paint, rattle can undercoat and semi-gloss black. Of course I wire brushed a lot of it first.
What can I say....I'm a former restoration addict