My 3 year old Winnegago had cracks going horizontal thru the inside skin of the exterior door. Out of warranty now so I replaced the panel with a new thicker panel from Home Depot for @ $45. Lippert built the door, so I imagine a lot of rvs have this issue. Pretty easy to change this out. You have to remove door from rv, then take apart the door, all hardware and outside trim, and window. Pull skin off and use as a templet for new panel. Reinstall. The panels from HD are 4x8 and are white or grey and textured. Looks amazing and a lot more solid feel to door.
