I wanted to get a feel for how this stuff worked, figuring it was the way to save my butt from inexperience since epoxy primer, let alone the paint itself, is NOT cheap (~$75 for a quart of primer and a quart of activator from Southern Polyurethanes).
What I did to test my setup and see how it all worked was get a large bottle of black acrylic craft paint from Walmart (~$4, much cheaper!), cut it with some water (about a 1:1 ratio) and sprayed it on to a few sheets of masking paper. It was fun and I figured out the gun controls.
|Practice. You can see the round spots where I was figuring out the spray pattern settings.|
Not really anything to it other than that, but if you've never done this before, like me, it's a cheap and easy way to learn how your gun works. And it cleans up with water...just make sure you really dry the gun out well so it doesn't rust!!!