I have just stripped wallpaper from my hallway wall and found bare plaster underneath, it doesn't look very old as it is in excellent condition and pink. Do I need to PVA the wall before I paint it or do I just mist it first?. I will be using a matt emulsion. My other query is that the wall going up the stairs looks like it has a shiny paint on it in patches, how do I tackle painting this with matt emulsion, I don't think it will be easy to take the paint off. thanks in advance