One other thing to keep in mind is metallic or solid colers. Metallic colors can tend to die back as a single stage because of the aluminum as well as anything with pearls. Vitamin c orange has a small amount of pearls as well as Plum Crazy purple and I have had both them colors haze over a little as a single stage. Solid colors seem to be more wet and deep but dont last in the elements and washing. Best single stage out there is Imron 5000 but its not cheap.