Blast Masters! I need your help.

yeah don't blast plastics, especially any that will be chromed. The chrome amplifies any and all imperfections. Once you chemical strip a inst' bezel you should find a mirror slick surface, where chromed anyway. I have 30 gallons of Welseys bleach-white in a custom soak tank but that's about repeated use. 11 rally bezels to date. The oven cleaner does work.