It's not the trim that takes the longest, it's the heming with the horsehair braid! For the front/back bows and the collar I used the heaviest iron on interfacing I could find at the fabric store. I have 6 full days left to finish this cosplay! I feel like it's not going to be enough!
I still have most of the boot covers to finish, glove rolls and band to start, wings to start, skirts to join to the bodice, back bow to sew on and headband feathers to glue in place. The list just doesn't end!