As long as we don't scare off raylit20; I'm OK with this. I see now why your proposal followed the underbody line.
I'm a big fan of redwood bender board. I'd put a stake at the point that these overlays agree on and lay a flexible board on the top of the rear fender and pull it to the height that the overlays also pretty much agree on, and use that. The transition from the car fender to the boat-tail wouldn't have that little break angle to match the line of the backlight.
