Hi there fellow campers. I have a 2000 coleman cheyenne. The original ABS roof shell is gone and it has grizzly grip now. I'm dealing with water damage in the storage bay which leaves a musty smell in the rest of the camper. I found that the plastic right by the hinge had some major cracks so I decided to put it in the garage to do some work. I tried plastic welding for the first time and was pretty successful. It's not going to be the prettiest thing but I still am happy with it. After plastic welding the cracks I decided to investigate the damage and found that the living space is mostly untouched but the storage box is pretty much rotted away. If I left it as is we may get one or two years out of the camper before it's just plain gone. My plan is to disassemble the plastic panels of the storage box, remove all the rotten wood, plastic weld any of the panels where it is needed and build up the storage box with all new wood from spare plywood i have around. I'm going to try to set it up so that I can use nice new deck screws all around, so that all the hardware is uniform. I am going to use 3m 5200 marine sealant on all seams. My goal is for the marine sealant to be the most expensive part of this, for it to look like the factory build, and for it to make the camper really last us a long time. I would love any thoughts and suggestions. I wish I got pictures before I started any work, but I just thought I was going to be plastic welding and got into a whole lot more than planned. I'm excited about it though.