Another question about my vinyl tileboard
I've noticed when I'm scrubing the walls down that the paint that was used before walls was wallpapered is gumming up and really coming off wall easy just a slight scrape with a fingernail and it's off the wall. Dry it's a little harder to get off but does come off. Person who wallpapered my bathroom painted a bit but did not use primer before wallpapering.
Should I remove that old paint or as much of it as I can before I prime the walls for painting?