There are a number of ways pigments can be utilized in final or protective finishes, from walls to woodwork. Anywhere a clear base can be applied it can be pigmented, or enhanced with mica powders.
Earth Pigments Library
Fresco & Patina Application for Lime Plasters
Efflorescence in Colored Concrete and Stucco
Coating Existing Latex Paints and Primers with Natural or Traditional Pigmented Finishes