We recently bought a renovated 1950’s house and they did not paint it well - it looks as if they just sprayed on cheap white paint and didn’t bother to sand or skim or anything to cover flaws. They also did this over wallpaper (apparently) in several rooms, as you can see seams. What’s the best thing to do at this point? Is flat paint better to use than a satin or eggshell for covering flaws? Thank you!