Painting urethane casting buildings

What is tthe best paint for the first coat (or primer) on urethane castings? The manufacturer suggests oil based, but I want to use an airbrush or at least a spray can. I’m thinking of trying Scalecoat. I’m also considering making the first coat (or primer) black, as this is supposed to give more depth to the finished model. Any thoughts on that?

-Michael Eldridge
-San Jose, CA

Rustoleum spray primer…

http://www.rolleiman.com/trains/clinic1.html

Jeff

I agree with rolleiman,or even Krylon.