Wayneman, use duplicolor primer sealer as a preparation coat. Thin the nailpolish one to one with thinner from the hardware store. Shoot it with anywhere 35 to 45 pounds on the airbrush. It will not come out with a shine, You will need to clear coat it after a couple of hours. models that are molded in any other color than white, tan or grey, (red being the worst color to paint on) will need to be sealed with a coat of Future.