Step 5: Let it Sit!
Once all the markering is done and you're happy let your shoes sit for at least a day before you spray/wear them. It lets the colours sink in. I didn't do this and all of my yellow bled like mad and I had to make some changes on the fly.
If you're wondering how the shoes hold up after six months I've got some pics up below of my first pair of shoes as they are now.
Now go forth, wear and enjoy!