uhhhh.....all bad ideas. hot water is your solution. also, dont wax the plastic trim. also, dont buff the plastic trim. DO NOT buff the wax/polish/compound into plastic, as it is not a smooth painted surface. if you do, you will soon realize that those products will fade the plastic. your real solution is to mask off the plastic while you buff and wax, then take you tire shine, or interior vinyl treatment, and apply it to the plastic trim. leaves it nice and glossy for a day, but it will fade into normal looking conditions and still protect it. DO NOT get the vinyl treatment on the paint though, it doesnt come off easily.