we've just bought a house and my son's room requires major redecorating as 3 walls have a beige fabric type wallpaper, very old as it's been on possible for over 30 years. This wallpaper is grainy, almost feels like gravel. is it possible to paint over it? I heard it would be a nightmare to take off. One piece is already curling up at the bottom but if you try and pull it further the backing stays behind. If not ok to paint over, any other ideas for redecorating it would be appreciated. thanks.