Complete remodel of my Class C 1983 Honey

Angels Mama07, I admire your ambition on this project. I had a class C Motorhome that was only 2 years old and the bunk looked almost as bad as yours!! While the paneling is off, you can watch where the water is comming in. I would pull the front clearance lights off and replace them. The window up front and the side ones should also be removed and new butyle tape put under them. Clean the area good before replacing them and never use silicone caulk. These are the biggest problem areas, even in newer units. Next big problem areas are from the roof line where the rubber roof meets the metal, and along the top and sides over the front and under the cab. That trim piece can leak also, take a few screws loose and if they are rusty, it has been leaking. If you have to, run a hose or pressure washer on the outside to find the leaks. If you can keep it covered while you are working on it, it may be benafical to you. Good luck and I hope your back side is O K. Please be careful especially when working on the overhead.