I love that you want to do an Anti-Spiral. That would be great to see at a con. However I think you will get a lot more responses if you move this to the Cosplay Construction threads instead of the suggestions threads.
My suggestion however would be to use that really thin material that is used for halloween masks. The type that looks black from the outside but you can still see through it from inside.
Vash the Stampede :+: Trigun [100%]
Atlus Crossover :+: Catherine / P3 [100%]
Kensei Muguruma :+: Bleach [100%]
Mercury Black :+: RWBY [5%]