I picked up a quart for the truck and I did quite a bit of coating underneath and still had some left. Since your car is newer and the underneath is probably clean, you will need a special coating to adhere the por 15 to the body, it holds a lot better to rust. I can't remember what it's called but if you go to a place that sells that stuff they should be able to lead you in the right direction. I haven't heard anything about Dupli Colors' truck bed liner so I have no idea how it is.