Just the steps, i can't really tell you what i did because i forgot it myself, i'm pretty random at my layering and sequence on what to draw first. But mostly just painting over the same layer until i get what i want.
i mix the colours a little by little first with the default brush "Airbrush Pen Opacity Flow", taking care of the form of the face, then i use a 'Airbrush Soft Round 300' with the softer edges, in a very low opacity to blend the hard edges together at the end. But mostly just on the wide skin areas like the cheeks.
This is really great! So are you using a tablet? I tried drawing with a tablet, but it's hard for my brain to sink up with the tablet and computer, so my art comes out bleh, takes me ages to make something straight from the tablet. I usually draw then edit it in my art program; is it easier to color with a tablet?
I use Photoshop~ I don't have a organized way of painting, each time i paint with a different process, so it's kinda hard for me to do a tutorial that makes sense. All i can share is go with what you feel, and it helps to study from references.
OMG!!!!!!!!!! That's the best fanart of Prince Gumball I'VE EVER SEEN!!!!!!! OH MY GOD! You are amazing! AMAZING! Thank you so much for sharing this amazing peice. How did you learn to draw and color so well? I'm always looking for more tips.