Hi. I have a quick question. I've just taken the wallpaper off in my bathroom. It just pealed off in sheets nice and easy but it has left glue marks behind. The surface is plasterboard that has been skimmed so it is smooth overall but is actually rough and a little bit powdery to the touch. Normally I would use sugar soap to wash the wall down but this is bear plaster and Im assuming will just soak up the water. What do I do? I want to paint the walls after. (vinyl silk?)
Many thanks