We've just started out with model rockets. Cardboard / plastic home brew rockets with Estes A/B/C engines.
We've been using nylon builders chalk line cord to tie the nose cone, body and streamer together and have had a couple of the cords burn through - it makes it kind of hard to find the rocket when you watch the streamer alone slowly make it's way back down!
We use recovery wadding or scraps of wool insulation which limits damage to the cord & streamer.
I know there is kevlar cord etc available, but is there a home brew solution - 10lb multistrand fishing line trace? Wool ?