Before you sell your house, one of the first pieces of advice you’ll get is to freshen up the place by painting every room with a fresh coat. So, you dutifully pick the right color to woo buyers (it’s usually some shade of off-white) and then, if you’re like me, you get tripped up by the finish. Satin, eggshell, gloss, semi-gloss — how do you know which one to choose? Well, it depends on the room.