Some advise, from experience: When spraying sunburst perimeters, don't spray at a 45 degree angle. That makes the "dusting" harder to control. It's too easy to get too much of the fine spray too far inboard.
The better approach is to spray perpendicular to the back surface, but......aim the center of your spray off the perimeter of the body by an inch or so.
Imagine if the body were sitting on a piece of cardboard. You want to spray a line, on the cardboard, all around the outside of the body. The center of the spray is off the body, by about an inch, and most of the paint is going on the cardboard. Only a small portion of the paint goes on the body. Doing this, it's much easier to control the position and width of the dusted edge.
When the dusting is done, then spray the perimeter of the body straight on to the edge, perpendicular to the edge. Don't angle the can, or you'll mess up the dusting.
Keep the can or spray gun perpendicular to the surface.