I have done a search, but have not seen a discussion on my question. My vehicle has shiny, same color, plastic bumpers (black). I usually throw a coat of wax on them. I am going to glaze, apply EX-P, and maybe a wax. I will use PC 7424, blue pad on EX-P, black on DWG. Should I apply the same products to the bumpers? From what I have read, there is no problem polishing these bumpers, so I gather that glazing and sealing will be ok too? Will these products bond to the plastic as they do to the metal, or am I wasting my time doing them? Thanks, Rick