If the wallpaper is not textured it can be a temporary fix..However, if the wallpaper was not placed on the walls correctly and eventually begins to peel this could be a problem. Also, if you run your hand across the seems of the wallpaper and feel where one piece begins and the other ends, you will also be able to see this after you paint and could cause the new paint job to look not so up to par! LOL Good luck!