Finished at last! It is not easy to take a picture of a skirt when the intended wearer is not there to model it, but I gave it a try:
In this interior view of the kick pleat, you can see where the vintage instructions have you clip the seam allowance right above the hem. The seams are pressed open in the hem. To help the inner fold stay in place, I put in a line of stitching through the fold to hold it in place. The kick pleat is also stitched at the top of the pleat. To make some neat lines of stitching, I cut out a little strip of freezer paper, ironed it onto the skirt, and stitched around it. You can see the underside of the stitching on the slanted top of the kick pleat above.
Next up will be a Mexican Peasant Blouse, then more skirts.