Just a thought...Not sure how this panel gets fixed to the car body, but if it is to be regularly removed, hopefully some thought has gone into how to prevent rub marks appearing on the body, as mating surfaces may well flex a bit with general vibration and bumpy roads. Does it come with a circular gasket?
I have added a neoprene foam round seal & will use washers to lift the panel off the rear where it screws on.
Over riders might have to wait for a big birthday