Going on a tip from our local paint supplier, we used a siphon feed gun to spray the flake. Editor Glad happened to own such an animal, this one from Sears. We used the gun as equipped out of the box. We wish we could tell you what size the fluid tip and needle were, but they were not marked. They are big, though (probably about a 1.8 or 2.0 tip), and thick enough to spray roofing tar. And that is exactly what we needed to do the job.