Spraying the rosco coating, with my canvas taped to a piece of foam core only slightly angled up from being parallel to the floor, I held the Wagner gun with the tip anywhere from approximately 12-18 inches from the canvas. I adjust the sprayer so that the least amount of coating possible comes out, and then even that is a little heavy, so I just lay off the trigger to get the right amount. I think you need to develop a good control of trigger tension to use the Wagner. Or if you want to spray heavier, I suppose you can just move the gun faster. I didn't find any problems spraying with different shape patterns, although I settled on adjusting it so that I had what appeared to be a pretty good circle of spray just test spraying onto a piece of cardboard. With the rosco coating, even my first canvas that wasn't sprayed exactly even turned out great once it dried. Can't speak to the Glamour product in this regard.