If anyone has ever battled wax stains on black rubber trim, my advice is to mask off the paint and use a Mr Clean Magic Eraser. I've tried all the other ways I've seen online, special products, rubber erasers, scotch bright pads, degreasers, even paint thinner, and nothing worked. A couple of minutes with a magic eraser and this annoying problem is gone!
Now my front end is perfect... apart from stone chips... bad headlight doors... a hole in the grille... and the bumper cover strip... and rusting on the fender seams.......