work in progress donkey

Sometimes I find nice but half finished images in my sketch books, they are born from my doodles and quite rough but still have some potential to be a good work.
This donkey sketches were one of my idea for work in progress show's post card but I didn't have time to finish this to bring to the meeting for selecting works. Poor donkey had nowhere to go but still carrying his heavy stuff....sniff sniff....well so, why not give him a peace?
I coloured this donkey with photoshop using collage papers. I personally don't like using colour swatches so tend to use the colour of old magazine's papers but still trying to find the best way.