you can find a written explanation for the process right here [link]
for a tutorial on how to create the cuts and sweat drops go here [link]
for any questions feel free to ask me in the comment section below or send a message to my mailbox i will answer it gladly!
if you want to paint the drawing and you need the line art i'll be more then happy to send it to you and to see the outcome!
hope it helps
finished work [link]