I've just uploaded in the post below a step-by-step PDF tutorial about painting my Aspiring Sorcerers backpack.
As you can see it is all hand painted with a brush and acrylic paints.
On the first page is a list of the Pro Acryl paints that I used for painting it, and Vallejo Model Color alternatives.
I had fun painting it, but those details are more time consuming then they might look :D
Regards
Flameon