try going to a local bodyshop,...they always have bits of paint daily that don't get used, and they usually throw it away anyway. most shops now use water base paint, and it works fine. take a small bottle with you and ask them for some flow agent to thin it for an air brush. it sprays realy nice and you can flash each coat with your air brush by fan spraying. then clear with whatever suits you. i have used everything from automotive urathane clear to spray can clear to future floor polish with good results.