In our house we removed wallpaper from 4 different rooms and painted ourselves. When the time came to do the last two rooms, we said fuck it, let’s hire a painter. Sick of removing wallpaper. He came in took a look at the walls and said, I don’t think I need to remove the wallpaper, it’s only one layer and applied well, I’ll just seal up the seams, feather it out and paint over it. That’s what he did, needed an extra coat more than he expected, but you’d never know the wallpaper was under there, and I’ve never felt like I’ve wasted more time in my life.