I'd wanted to experiment with this method of colouring for a while but I didn't get a chance to do the blotchy parts till today. It's pretty hard to control, and I didn't at all expect the way the shellac-infused inks interacted with the water-based ones (see: ugly spots in top illustration).
I quite like the way the latter two illustrations look, but it still seems lazy to me. This could be my weak Photoshop skills, too. Well, back to work.