Hi,
We have a comic book project with a friend and we're planning to heavily resort on Black ink to achieve the kind of art direction we're leaning to. So today I tried to test the brushes and options of this incredible software to establish a workflow. Here's what I came up with (the character is Lobo from DC comics, it has nothing to do with our project ). You can view the full resolution in the link below (A4 format).
http://imgur.com/a/sek5y