Its depends on the finish your actually talking about. Matt and Satin are NOT the same thing.
Matt is a bastard to keep looking good. Satin is slightly easier but its not like gloss paint where a coat of polish/wax fixes things up.
The best way to apply satin-effect is with a proper paint first then a satin clearcoat. Or a clear coat with flattening agent mixed in. I think PPG do a satin clearcoat which you can even wax and polish too to keep it nice.