My daughter and one of her roommates were fooling around in their college house and put a large hole/dent (about 18"x24")in what I think is a plaster wall. There looks to be no lathing behind it but the wall is not drywall. There is some kind of a mesh, almost looks like gauze, embedded in the wall material though. This house is probably 75 years old.
Can this be cut out and repaired using a piece of drywall? If yes, how do I cut plaster without causing more damage? Would we use the same materials, drywall compound etc., even though it would be binding to "non-drywall"? If the cost is going to get too high, we'll just give up the security deposit, but if we can, we'd like to repair it.