Hi all. Not sure if it’s paint or adhesive but I have this white with green flek stuff on my plaster below the wallpaper we just removed. A lot came off as you can see but a lot didn’t. Sanding doesn’t get it flat enough and you can still see bumps. Any ideas to remove this without plastering over it? Or any ideas what it is?
We thought belt sander to chew through it but that’s still a lot of work.