A few years ago we had the thermostat moved in our LR. There was a hold in the wall and we have a blank cover plate over the area. Even though it's painted it's distracting. There's also a screw or two sticking out of the wall. I have a small picture covering it but honestly I'd rather not have anything there.

The walls were painted a few years ago using Ace Royal paint in eggshell matched to BM Shelburne Buff. The paint doesn't touch up well. - At least I haven't mastered the art. I definitely don't want to paint the entire room again. What if I paint that wall with the leftover paint. Will it match the other walls? Has anyone ever done this? We don't smoke and there's no discoloration if I look behind a picture.