We were a fleetwood dealer and had to repair several stepwell boxes. It is a simple repair and easily done by anyone with simple carpentry skills. I always went back without the metal cover. I felt it held the moisture in and caused most of the problem. I always primed the box and sprayed with several coats of undercoating.
1998 Pace Arrow 35 ft. F53 Ford V10 2012 Honda Civic toad
15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.