I have no idea what I've got here.
House dates to 1906. Rest of the house is plaster/lathe, and I think that's what at the base of my hallway walls (bottom half of the walls). However, since then, they've been covered... with something. Trying to remove it so I can skim coat and redo the halls.
There are clearly two layers of paint over a textured wallcovering with a design. The wallcovering, however, appears to be a couple mm thick and possibly made out of a masonite-type product. It appears to have been glued with the will of god over a very old layer of dark green paint (or paint-like substance; it is dissolving with the water/fabric softener mix I sprayed on for the wall paper), which is on a white semi-shiny surface, which is over the plaster.
Again, from the base, that's:
semi-shiny white surface
cardboard/masonite layer which may or may not be the base for the
textured wall paper
at least 2 layers of paint
The cardboard type layer had lifted from a few small areas, so I was able to remove it; It was very stiff and brittle, not like regular wallpaper. And now that those sections that removed themselves are over, I cannot figure out how to get the rest of it off.
At first I thought this cardboard-ish layer was the top layer of sheetrock, but the fact that there is the green layer underneath it - and the fact that it seems to be pulling up at the corners - lead me to believe this is something that was applied over the original walls. I was thinking maybe it was beaverboard, but everything I've found about it doesn't suggest that this is an application it'd be used in. It seems like a very thin masonite or a very thick wallpaper.
Any ideas? It's a lot of angles, so I'd prefer not to have to break out all the plaster and sheetrock it. But I am at a loss and google isn't helping. Thanks!