Satin: Satin finish paints are probably the most commonly used finish, on both interior and exterior surfaces. As with eggshell, this finish is good for high-traffic areas like kids’ rooms, hallways and family rooms. Satin finishes resist mildew effectively and are easier to clean than flat or eggshell finishes, and can be wiped down or scrubbed lightly. On exterior surfaces, satins are ideal for painting siding that is in good to excellent condition. Outside surfaces painted with satin paint also shed water effectively and don’t fade quickly from the sun. They are also a good choice for painting trim and shutters.