Stretch the coil to slightly longer than the length of the hanger, and then hammer it on a metal block.
Cut a length of 28-gauge wire to sew with, and create a small, tight coil at one end to make a “knot.”Thread the wire through the hole on one end of the hanger and begin sewing the coil to the hanger.
Starting at the center and measuring out, mark for holes along the bottom edge of the hanger, every ¼" (6mm). Drill a hole at each mark.
Leave a little overhang of the coil to start, if it’s a bit long for the hanger, and you can trim it off when you’re done. Pull the wire taut as you go, and keep the coil centered at the bottom of the hanger.