Angel, I'd say very sturdy. It's tough to support things when it's wet and when you're going against gravity. When I re-do ape city it's what I plan to use.
I want to give ape city a raw look. I was using this as a kind of reference picture. I would just slop the edges a little.
I have these huge sheets of Foam Core 1/4 or 1/2" thick and and I want to make a fly wall to take some pictures. If you look at this stove and imagine the ove door as the front door of an ape's house, using the rest of the foam core to act as the house after it gets textured and shaped. Does that make sense?
I can cut holes for windows and add depth with flower beds, etc.