For Part I of this mask, go here. For the rest of the costume, go here
Since the original post, I added a layer of Plasti Dip to much of the front of the mask to give it a better texture and make the color a little more matte. It also helps keep the tape from turning up at the edges.
In this second installment, I changed the mask from a fun decoration to a more wearable mask. I needed to change the chin strap, which was neither functional nor aesthetically correct, and I also needed to make a way to fasten the back of the mask together.
Having completed the chin strap, I realized that the back of the mask was still flaring out. After a bit of trial and error, I realized another strap like the chin strap but behind my neck was necessary. I made this strap in the same way I made the chin strap, but this time behind my head. Both straps ended up getting a bit of trimming so that they do not stab into the back of my head or my neck. For the cowl I ended up just sewing a piece of black rayon/spandex into a neck gaiter (tube) which works well.