The wife and I just recently had blueboard/plaster guys in to do the walls and ceilings of our living room. While they did an amazing job, there are a few very small areas that are either slightly rough compared to the rest of the walls or some very light trowel marks. I have a few prep/paint questions below: 1.) Should I do anything to smooth these areas out prior to prime/paint? If so, what grit sand paper? I was thinking the wet sand grit, but doing it very lightly and dry. I was also thinking that the primer/paint thickness would pretty much hide any slight imperfections. 2.) Any specific primer better than others for on top of fresh plaster? I typically use Killz when working with sheetrock/joint compound. I was thinking I didn't need this type of primer and could just use generic primer. 3.) The ceiling plaster is textured with a light drag. What is the best/easiest way to go about painting it? My thought was a very heavy knapp on a roller.