I can't help, but I just wanted to say I think it's awesome you're doing Loki. I am going to be Black Widow this year, so I'm a huge Avengers fan! I am putting my costume together because I can't sew or do extreme crafting, but I am making a belt buckle and some S.H.I.E.L.D. patches.
Good luck! I hope to see pictures when it's done!