Stoner Trim Shine Aerosol - 12 Ounce (Pack of 2). Trim Shine is an easy-to-use, spray-on coating that instantly shines and brightens dull or faded plastic, vinyl, rubber, and other surfaces. Trim Shine restores color and brilliance to bumpers, running boards, door trim, convertible tops, dashboards, seating, AC vents, hoses, door gaskets, and more. It even hides ugly white wax marks on black exterior trim.