Somebody please explain to me one more time why this is so difficult. I've seen something in apartments, and also in older homes too many times to count. People get a long-nap roller, and slop paint over everything in sight, including hinges, doorknobs, wallplates, switches, and receptacles. I've seen wallplates and receptacles with so many layers of paint over them it looks like the snout of a pig trying to push its way through the wall. All it takes to do the job correctly is to remove two screws and pull off the plate, and stick on a couple little scraps of wide masking tape. This is one of very few switches in the house worth saving, the receptacles and most of the other switches are going to be replaced.