I've got it in a pickup bed. It lives outside and is used to cart dogs about every day.
It does hold the dirt a bit. Can't say it goes green (unlike the bit of carpet the dogs sit on). It pressure washed off easily enough. I went for a fairly rough finish so maybe a smoother coat would wipe clean?
i didnt use rapter but i did use gravitex in the footwells of my datsun with no ill effects.
granted my footwells wont get the use a landrover will get