I made a "bib" for my Leaf, to protect the paint around the charging access door. I attached it to the two pop-up fasteners, as you can see. No drilling, etc. A 5-minute job. It folds back out of sight inside the opening really easily when you close the door. I used a piece of vinyl I had left over from when I did some upholstery work on an old Porsche many years ago. I remember that the Porsche had something similar to protect the area around the fuel filler opening. Notice that I had to cut out the center area, so the flap would not interfere with the access door latch when closing the door.
Sorta "crude"; but, it works, and is only visible when charging..