@Slownsteady It's actually an apartment, Im not sure exactly how old. But it looks like a thick, maybe cardboardy piece of paper. Its torn off, and behind what I think is primer and then he actual paint.
Hello, Forum :)
Im very new to anything concerning carpentry/electrical/ect. and am just now do research on it. Im trying to do a plaster job on the water damage in my apartment, but dont really know what is what yet. Im most questioning the paper like substance behind the paint, but in front...