Add just a couple drops of the Polyurethane to your thinned paint. Just one or two drops is all you need. The Poly greatly increases flow from your airbrush on top of the already amazing flow and leveling of the paint. The results are further leveling , durability , increased sanding capabilities and will also add a very light eggshell finish. When spraying straight from the bottle with out thinning your paint add one or 2 drops and adjust your PSI accordingly. You can pull ultra fine lines. Figure painters add a drop for slower blending. Adding too much polyurethane will cause the paint to dry much slower. Do not add Poly to the Mission Models Primer. Remember less is more.
Example: If you have 20 drops of paint in your epoxy mixing cup add 2 drops of poly. We advise hand mixing VS shaking