Interesting use for pantyhose. Back in my R/C airplane days in the 80s and knowing people that still do it now, pantyhose is sometimes used as a substitute for fiberglass, except where a lot of strength is needed. In other areas, it would add some strength, but have a lighter weight overall. And now with electrics since they don't need to be fuel proof, you can use white glue or carpenters glue in place of resin. On some various models, I have used it and even molded some parts with it. I didn't use resin because of the smell, but it probably would have hardened faster. I had a couple layers with carpenters glue, over a week or two, I would drop the part on the desk and you could hear a difference in sound as it would continue to harden, I could also tweak it a little early on, but not later. Fiberglass is nice, but cutting and working with it can get those little fibers everywhere which is not that great inside the house, especially with pets running around, or with cats, getting on the modeling desk. You don't want those little glass fibers on them.