Single stage paint?

[Racing Rice]

"Single Stage" system is nothing more than a solid or metallic color applied over a primer/sealer. Known as a "S/S system," there is no clear paint necessarily involved in this system. Because the color must be "color sanded" with 2000 grit 3-M paper (used wet) to remove small flaws, it is usually best to only use solid colors. Sanding a metallic single-stage color almost always results in "splotches" in the color because some of the metallic paint is removed during the color sanding step.


http://www.customclinic.com/Library/...int_terms.html