So this is the Hoodie for my Jack Frost Cosplay.
First I used white and several blue shades of fabric paint to create a frost pattern. Then I used glue to create darker hues around the pattern.
The frost itself was created with a hot glue gun, so it's still a little see-trough. And in the end I used a little bit of white and blue fabric paint again and a little bit of glitter.
It was time consuming but fun and I'm happy with how it turned out.