1.   Apply a primer, and finish with two coats of a flat oil-based flat spray enamel.

2.   A. The best paint is an oil-based primer and oil-based spray enamel.

3.   Actually, you could use an aerosol spray enamel as a finish coat.

4.   One thing you might try is to use a spray enamel over the primer.

5.   Then apply an oil-based primer and finish up with a spray enamel.

6.   Williams uses ordinary Krylon spray enamel.