the finish's integrity. If repainting is all that is required, the new paint is matched to existing paint colors using safer, modern and more durable formulations. In these cases, restoring the appearance of an earlier surface is not the objective. Rehabilitation In a typical rehabilitation, more latitude exists in choosing both the type and color of paint as the objective is the efficient reuse of interior spaces. Selection often weighs factors such as economy and durability, use of a high-quality standard paint from a local or national company and application by a qualified contractor. Color choices may be based on paint research reports prepared for interior rooms or exteriors of comparable date and style. More often, though, current color values and taste are taken into account. Both interiors and exteriors of institutional buildings, such as university buildings, city halls, libraries, and churches often contain rich decorative detailing. During rehabilitation, care should be taken to retain or restore selected portions of the decorative work as well as the color matching process, to evoke the historic sense of time and place. At minimum, it is essential to use historically correct paint colors in placement. Restoration In a restoration project, the goal is to depict the property as it appeared during its period of greatest significance. Based on historical research, onsite collection of paint samples, and laboratory analysis, surface colors and treatments can be recreated to reflect the property at a particular period of time. In the restoration process, colors are custom-matched by professionals to give an accurate representation using the methods described above to sustain the historic integrity of the building. If an artist or artisan can be found, the historically replicated paint may be applied using techniques appropriate to the period of the restoration. Although custom paint manufacture is seldom undertaken, color and glazing are equally capable of being customized. One of the earliest examples of structural restoration based upon historic paint analysis is the restoration of Williamsburg, Virginia, funded by John D. Rockefeller in the 1920s. Investigations carried out by Susan Nashof by simple scraping and revealing of older finishes of buildings yielded a palette that became popularly known as Williamsburg colors. However, advances in paint color research suggested that the popular Williamsburg color palette was derived from faded and aged finishes. During the 1980s and 1990s, Colonial Williamsburg consulted with Welsh to undertake a comprehensive paint and color analysis