My buddy is starting to redo some of his rooms in his house. However, he's confused and doesn't know where to start. Now I have a bit of experience being only 20 years old with this stuff, because we redid our entire house so I got to learn first hand how to do some things. But there's a few things that my buddy wants to do that I've never done. For example... Say you have a light switch, and you want it removed. How do you patch it? I believe it's plaster behind the paneling. What would you do to plug the big square hole where the socket was? I wasn't sure what to tell him... And, you CAN paint right overtop of drywall, can't you? Assuming you spackle everything of course. But we hung drywall everywhere but we put paneling overtop of everything, so I wasn't sure if you were able to paint right overtop of drywall.