Whether brushing or spraying, always finish the most seen and touched surfaces such as tabletops and chair backs last to avoid runs and overspray showing up on these parts.
For example, finish the legs, rails and the edge of a tabletop and then brush or spray the top (being careful not to drag your brush over the edge and create runs). On a chair, turn it over and finish the insides of the legs and rails and then the outsides. Stand the chair up and finish the backside of the chair back, the arms and finally the chair seat and front side of the back.