I was at Menards a few months ago and found the Copper Hammered Paint in quart cans. Which made me happy!!
Trying to empty rattle cans into my paint guns for large signs, super sucked.

Its also on Ebay if you cant find it at your local Lowes/Menards, etc.
http://cgi.ebay.com/Quart-Copper-Hammer ... 609wt_1141
You can also manipulate this paint being able to shoot it from a paint gun, making the fisheyes (hammered effect) bigger, deeper, or smaller depending how you set up the gun and part temperature.