You can try to make this textures with wrinkled paper, or anything like that. You must look for something with texture, cover it with paint and go. For the areas with no drawings, you can spread fabric paint with a toothbrush and a little piece of cardboard. I think that, soon or after, you will have to retouch some parts by hand, but if you do it this way, it would be easier and faster.
Working on: Anna (Frozen)
Future cosplays: Rapunzel Astrid HTTYD2