I recently moved into a ~150 year-old Victorian Terraced House in London. The people that lived in here before had glued some things to the interio wall that left some ugly areas upon removal.
I am now trying to figure out how to fix these areas. To me it looks like there is some layer between the now-exposed wall and the paint, but it does not look like usual wallpaper.
Could someone point me in the right way about how this can be fixed? Do I just use a thick paint (clay paint?) or do I need to do I need another layer first?
EDIT: upon further investigation, there does seem to be some sort of wallpaper (see last picture). Is there any way to fix the affected areas without changing all the wallpaper on the entire wall?