Here is what I did on my 54 that has cardboard kickpanels. At Home Depot I found a roll of faux leather plastic shelf liner that has a sticky back. I bought black but it comes in a variety of colors for 5 or 6 bucks, and covered the cardboard with it. It looks nice and cleans up easily. I am also experimenting with it for my headliner but molding it with a heat gun is tricky.