It's finally somewhat finished. Might do some adjustments to the background as I really didn't know what to make of it.
I'm somewhat satisfied with the results, though some parts haunt me a bit (The eyes... they want to kill me).
Overall this took about 43 hours as this was my first full-scale photoshop coloring and everything I did was unefficient.
Timelapse of whole process:[link]
Original lineart: [link]
Not so good marker-version: [link]