Almost used my Dark Olive for the back - I know you guys use a brush to tap paint over the top but I took an old pill bottle put some powder in it and put some really fine SCREEN material over the top and taped it on. You have to have a cheap plastic bin under it but it helps put the paint back in it's jar after you're done.
Takes a bit of practice to get the right effect as you saw from some of the jigs LOL
Here's my toy: