I can't wait to see Anna's spray brushes, but in the meantime I checked out her overlays in the store and just had to get a few more of them. Some that I thought you might like to try while you are waiting are:
Blue Shimmer Paint Overlays 12 X 12
or
Textured Overlays No. 02 12 X 12 by Anna or
Splatters No. 02 Brushes and Stamps by Katie.