Originally Posted by Bob_G
I just tried the peanut butter method AZfocus2012 suggested: Wow! It was rubbed in to the rocker panels and grille with an old toothbrush or a rag depending on the precision needed. After 5-10 minutes it rubbed off easily. Wax could be seen in the rubbed off PB. The plastic darkened up enough that I'm going to see how long the PB treatment lasts on its own. Mothers Back to Black is the next step if needed.
Back to black is temporary at best.