Mr C...A few years ago I removed a compartment door for a friend on a R Vision. The doors are held on the same as our Damons. The doors, as you know, are on a trach. The track runs the length of the coach. To remove, say, the middle door, you'll have to slide all the doors off before it. On the R Vision there was a cap at the end of the track. I had to drill out a pop rivet, remove the cap and the doors slid off. On my Damon, I think the moulding covering the seam for the front and rear caps is in the way so you have a choice. You can remove the moulding, unfasten the track from the coach and pull it away enough to slide the door out, or spread the track opening enough to get the door out. The problem with any of these ideas, at least on mine, is the tracks are painted as is the moulding. Any of these will damage the paint.
I think I would look into the epoxy idea with the door in place. You can fill the holes and put wax paper over the holes with tape over the paper. If you go to a marine store you'll find that there are fillers you can add the the epoxy to make it more like bondo. Lot's of options.
Hope this helped...
2002 Damon Challenger 348