After using heavily a steamer on the walls, the wallpaper of the ceiling is full of brownish areas due to steam. I also damaged the wallpaper in some corners.
I figured that instead of removing this ceiling wallpaper and paint the ceiling, it'll be easier to simply put a new wallpaper on top of this wallpaper.
But although I find a lot of resources about papering a bare ceiling, I found none about papering a ceiling on top of an existing ceiling wallpaper. Is it possible in the first place? Is there any problem compared to papering a bare ceiling?