Just covering a couple of vintage designs (A Squig and a Pirhanna since you ask) I was going to use Nylon, but decided to try some Sig Koverall.
Happy to say it went on very nicely and easier than nylon
I used clear UHU as an adhesive; two coats thinned with cellulose thinners brushed on and allowed to dry then stuck the Koverall on with an iron just like film. A quick blow over with a hot air gun tightened everything up before giving a few coats of dope (2 x 50/50 and 1 x 60/40 so far, will give a light sand down and add a couple more 70/30 later today to give a nice shine)
I've a few others to do and was going to use silk on mylar for a couple to compare weight wise, but coverall looks like nylon and is about as tough. Only drawback is it's only available in white, although some folks dye theirs)
Cheers
Paul