Suzie-- I've actually been trying to tackle that same issue too, haha. I'm thinking that layering varios fabrics, like a yellow-orange tulle or organza gathered over top of a shiny red fabric, might be a cool way to do a streak of flame.
Personally, I'm also gonna go with the EL Wire route to add a little extra warm glow, since I'm already buying a bunch of orange and yellow for another project. Might as well make use of the extra, right? *laughs*
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- Emperor Lelouch (Code Geass): 4% (Planning) Otakon 2015
- Hilda, Player Character (Pokemon Black/White): 32% (Sewing) Otakon 2015
- Magic Armor Link 2.0 (LoZ: Twilight Princess): 5% (Armor Revamp) Summer 2015
- Pyrrha Nikos (RWBY): 1% (Planning) Otakon 2015