The black trim piece along the bottom needed some help. I started there tonight. Gave her a bath with dish soap after removing it from the bumper. You can see there was plenty of scraping, and a tear to begin with.
So far I have sanded 90% of the scrapes off by hand, and filled some deep scratches with black RTV. That should stick and remain nice and flexible. I also cleaned up the cut with a razor, and filled it on both sides with RTV while letting it sit in its natural resting position. We will see if that holds with a little twist test after it cures. If it stands up, then the whole thing will get a very light coat of rubberized undercoating that will serve as giving it a uniform texture, and then finally a coat or two SEM trim black paint.
Here is where it sits as of now, drying. The crack is toward the fore front of the picture, and the line you see that appears to be the crack, is actually a sanded edge of one side of the crack so that it is smooth to the touch after I apply the rubber undercoat.