Shading..as in..Tone.. let me show you...(refer to attached images...and..no i do not intend to show off, these are just quickly made...so..dont...draw thick dark lines like i have... >.>)
When you shade, you must know where to shade basing it from a light source eg. left or right, where the light its coming from
and freehanding basicly means done by you, and not done by a part of a program that generates that part for you. meaning you draw everything only with the help of brushes and tools, filters are made to mimic freehand stuff..well sorta..
The images i have done are freehanded, i did the shading manually and drawn it manually.
im no technical person, Afro might be able to help in this area, but ill try to explain as best as i can.
anyway:
image1:no shading, just solid colours
image2:shading, the stuff that makes 2d feel more 3d(but not..actually 3d >.>) and as you can see (sorta...) the stripes have blended in with the shadingand thats how your runes should be like.
and also, i wont touch your skin, i dont feel comfortable touching peoples work (well i have touched falcos..but not others from what i can remember)
EDIT: screw it, i changed my mind, ill edit your skin but ask me if you want me to pm the preview to you or post it here.