We want to paint over wallpaper in our teenagers room to make a nursery for our newborn when he gets here. Our teenager had posters all over the walls and this left pinholes and pock marks. Painting over it just shows them up even more. We tried spackling but missed several places. Is there any other way to cover the holes or should we just spackle again and repaint. We only painted 1/5th of the room when we noticed what we missed. HELP!!