Same Wolf, Different Technique

I painted this wolf recently using a mixed media technique and although it turned out reasonably well it wasn't quite what I'd wanted to achieve.
One of my favourite wildlife artists is Carl Brenders who uses a technique which includes the use of airbrush.
My airbrush was hiding in a dark corner of the attic so I rescued it, brushed off the cobwebs and tried to use it. Having been ignored for so long it flatly refused to allow any paint through the nozzle. However several hours of coaxing, bullying and finally taking it to bits restored function.
I started by painting in some of the dark fur in sepia watercolour then blocking in some colour using the airbrush. The next step was starting to paint in the fur using gouache which is the stage I'm currently working on.
I'm not sure how much longer I can resist completing the eyes.