I have tried waxing the tail lights and the black plastic panel between them, but have not been satisfied with the results, as everything looks kind of cloudy and if you don't take the product off with velvet gloves, they scratch VERY easily.
I use this on my plastic lenses on my glasses:
I decided what the heck and tried it on the rear end and all of the plastic there. I am VERY happy with the results:
Use only a microfiber towel, and rub gently when taking off the Plexus. You also don't even need to let it dry, as you are supposed to take it off while it is still wet.
And it is anti-static, so it will be interesting to see if it repels dust better, as the whole back end seems to attract dust after driving for a short period of time.