The cheap way they do it is with John Deere Blitz black, which is the satin black. It is actual paint, not primer, and will seal well. You'll hear different reviews about it and the biggest complaint people seem to give is that you can't paint over it - what they don't realize is that it's an enamel paint and must be painted over with enamel, not acrylic like most automotive paints today. Another way to do it is like the others have mentioned and add a flattening agent to the clear coat. That way you can have whatever color you like as a flat or satin finish (based on the amount of flattening agent you use).
