ok, i dont know what anyone else will think of this of this idea, i may get some comments, but i have done this and it works well if you take your time:
when i have had items in the past that have a hole that i cannot sew together or that i can not afford to have professionally repaired, i use wonderweb! For example, if an item has a large moth hole, i take a piece of material from the hem or seam slightly larger than the actual hole size, i cut small pieces of wonderweb and lay the "patch" of material over the hole, then i carefully insert the pieces of wonder web under the edges of the "patch" ( this is all done from the inside of the garment), making sure that the wonderweb doesnt go too far under the edge so that it shows alot of the outside ( a little bit is ok), then lay a damp cloth on top of the patch and place a warm iron on it, even better with a tiny bit of steam, and the wonder web seals the patch into place without any stitches requierd making the repair almost invidible. Wonderweb can be washed too , although i always wash it gently, usually by hand as i would a vintage item anyway. I really have worked mini miracles with this method and its great for items that cant be sewn too, like materials that will just keep pulling apart if you sew a tear or something ( like muslin or something very fine).
kelly