I use undercoating sometimes for a sealer on the inside of the enclosure . It tends to stay softer than the bedliner and shows little marks and scratches after a while //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
It does stay softer I just went out and notice that.
But for me I can not fit anything else in my trunk so it wont get marked up.