I believe that you should use modern two part urethane paint just because it is superior to any prior paint system. You can get the original colors at most paint suppliers. Even though base coat clear coat is the standard these days a lot of folks that do restoration work use a single stage urethane as they believe it looks more original then the depth of shine that you get with BC/CC. I am spraying mine with a Dupont single stage urethane and am very pleased with it.
