I'm considering getting bed liner applied to the rocker panels and area behind the wheels before installing my mudflaps. It's not uncommon for icy roads to be sanded in the winter and I'd really like to avoid any rust or repainting in the future, which is why I purchased the mudflaps. But given that sand will always end up between the paint and flap, I hoping the bed liner will protect that area. Has anyone done that? How'd it work out? I know I've had some kind of protection behind the wheels from the factory on some of my vehicles in the past.