I would suggest either base coat clear coat or the integrated clear method suggested above for the inexperienced or painting in an open air garage where runs or trash might need to be buffed out. A single stage gold mettalic is just not going to buff without break-coating. Single stage metallics are pretty much what you see is what you get whether acrylic, urethane, or brand, and single stage gold is one of the more difficult colors to lay down without mottle.