Welcome, Greg! I just fixed a sagging ceiling in my Scamp
last week, you can see some pictures HERE
, Took me a couple hours of easy work, needed 3M 90 spray adhesive, a roller (which I made), and a respirator. I used hot glue for the seam tape. Turned out well.
I reglued the center piece of reflectix and rat fur from the roof vent forward to the top of the front window. After having it all down, I would never consider just painting
the glass and leaving it like that.