For nostalgic reasons, I want to keep a large wall mural (approx. 5'x5') my child painted years ago on a bedroom wall in a house we're moving out of. I would like to know the best way to remove the section of drywall it's painted on. I'm assuming I can use a keyhole saw to cut the painting out, but since I can't see where the original drywall seams are, or where the screws/nails are, I'm not sure how to go about pulling the entire section off once I cut it out without damaging the painting or having it all fall apart on me altogether. Because afterward, I would like to mount the entire section of the painting on a piece of plywood backing and re-hang it in our new home. Any ideas?????

Here's the scenario: My partner and I had to put up Shelving Standards for a store recently. When they were up, they decided they were installed incorrectly for their needs. So, we did as they asked, however, there are over 120 holes left where the standards were initially installed. The wall material is like Masonite, being paper, about 1/2" thick, and colored. The problem is that the screws bubbled the areas around the screws, and in order to fix them, we will have to fill the holes and level them. Next, they need to be painted. My question is, what is the best method of filling them and leveling the areas around the holes? My thoughts include using 1/8" wood dowels, driving them in the holes, then use spakling compound. As far as the bubbled areas, maybe I could just hit them with a hammer to dimple them prior to the dowel trick. Will this work? Or should I use another method? Thanks for your help. cuedude