Catching Fire-SHADING tools

Here's a few caps I took when I was doing the shading for Katniss. I usually do my lines and shading with marker/watercolor pencil, but markers aren't very precise actually, so they need to be faded and blended in using blenders(colorless).
A useful tool to make corrections and help achieve an ultimate blending is STABILO-All surface that act like a 'veil' that en-light any color and helps uniform shading. I also use Prismacolor Premier's face colors that can also work on surface already colored with markers. I started doing that process from image 1 to 2. You can see the final version below and other tools/wip from previous HG work last year