I may never use any other type of paint!!!! The ease of use (water cleanup and no smells) and dope-like finish makes Nelson's paints a no-brainer for WWI birds. The only reason I might use latex would be if a color I wanted wasn't available from Nelsons. That having been said, this paint does take a some relearning. It's best applied with a foam brush and essentially pressed into the fabric. Unlike other paints you can almost just keep brushing it over and over until it's almost dry. In fact, that's what I typically do. I slop it on for the first coat and then just keeping going over and over again with the brush in smooth even strokes. Brush marks are not much of a problem. Also you'll notice little bubbles forming that look awful but as you continue to brush and the paint dries, the bubbles disappear and you're left with a smooth flat finish.

Still, the easiest (and cheapest) way is probably to paint colors with latex and then seal it all with Nelson's flat clear.