Conveniently I have had this skirt hanging out in my closet for years, but never wear it anymore. So I decided this would be a good opportunity to try a new technique for modifying an existing skirt into a steampunk piece.
You'll also need some thread that matches your skirt as closely as possible.
You want to cut you tape to the right length, and if your tape has two cords like mine, tie the bottom ends of the cords together to prevent pulling them through the tape accidentally. You may want to pull them to the back side of the tape to hide the ends. Fold the end of the tape under and pin.
Do the same at the top of the tape by the waist, but you want to leave the ends accessible for adjusting.
Stitch the tape into place down both edges of the tape. The only problem with this method of gathering a skirt is that the stitching shows from the right side, but when it's pulled up you won't notice. It's a really quick way to modify a skirt, and get nice pleats and swags.
I planned to sell this skirt, but now I think I may keep it... :)