I went to a upholsters and they didn't have Dacron wrap..but according to them they had something similar called polyester wrap they use it the same way as dacron. Could I use this material for the hangers?
Dacron is a type of polyester - I'll bet you its the same stuff.
*But* that raises a question: On the SAE site it shows hangers as being fiberboard with insulation (rigid?) glued to each side. Can I get good performance by just wrapping the fiberboard with dacron/polyester wrap? That would be a LOT easier!