When I finished mine up a couple of months ago, I used as the base colour American Accents Metallic Aged Copper spray paint from Home Depot. For the end tail I used a Model Master Purple Pearl in the jar which I hand painted it on. As for the grooves and hightlights I used American Accents Light Patina. Also from Home Depot it came in a DIY set with the Patina, a brush, gloves, etc. I'll try to find a picture of my Zat.
Justin