i taped an old rag behind the plate. Never had any issues either, keeps rattle down much better then any matting. Keeps the license plate completly off the sheet metal of the trunk.
cut up a tire innertube and put it behind the license plate. works wonders //content.invisioncic.com/y282845/emoticons/santa.gif.e1ec9cf2e0a0dd232ad35aa594a126d0.gif sadly i have done this and it worked i have deadener to put behind it now just havent had time to do any deadening lately plus it snows a lot //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif