Step 1: Cut & attach fiberboard and foam
Dave sawed off the tips of wood that jut out at the top of the frame so we'd have a neat, rectangular shape to start with. Then he took a piece of plain ol' fiberboard and cut it the same size as the headboard so I'd have something to upholster over. A mist of spray-mount holds the foam in place.
Step 2: Add the layers of foam and batting
A layer of batting, also spray-mounted to the foam layer underneath to keep things from shifting around.
Step 3: Pulling the fabric over the frame
When you pull the batting and fabric over the frame, pull firmly but not so tight that the foam gets lumpy or the pattern distorts. Start from the middle and work your way out, top, bottom, then sides. A bazillion staples later... Just trim away the excess on the back of the headboard. I have another piece of fiberboard that will get screwed onto the back side to keep the dust from collecting inside the frame.