Hi Tom, sorry to hear! First I had to think about the metal piece under my rear bumper with licenceplate and reversing lights on it. I scratched that several times in underground parkings, lastly in a Hotel Parking in Charleville-Mezieres.But mine is metal and can easily be bend back. (SS numberplate frame takes the scratches..). These ramps are often nasty steep and not always broad enough to make a diagonal approach...! I now think to know what you mean on your young 4/4, and I think that you don't have to worry about further damage. Repair it or order a new one, you have to repaint it anyhow! Good luck!