Can You Paint Over Wallpaper Board. The most important factor to consider though was if your wallpaper was sized properly when it was first hung. One if you want to take the paper down eventually its best to just bite the bullet and do that now.
If you have rips or peeling. Now you have the power to rival any professional. However if you dont have any choice but to paint over the wallpaper apply a primer then apply 2 top coats of paint on top of that.
The wallpaper will likely bubble up and it may start to peel in the future.
You would not want to paint the wallpaper- have the chalk paint moisten it and then have the wallpaper fall off the wall. Experts recommend 120 grit sandpaper or a motorized orbital sander. One if you want to take the paper down eventually its best to just bite the bullet and do that now. Then you can do what you wish to the area.