Hi Red Owl,
Go to your local hobby shop that sells model airplanes. They will have a wide selection of Testors paints. I have used their Acrylic but they also have Enamel paints. They come in 1/4oz bottles in just about any color you might want. You need to decide if you want Acrylic or Enamel as they take different thinners.
If I was doing it today I might experiment with the Enamel Paints.
Testors Enamel Paints