Textile and objects conservators at the Smithsonian Institution's National Museum of the American Indian (NMAI), Suitland, MD collaborated on the treatment of a woman's robe made from a large, black wool tradecloth and decorated with numerous white metal buttons, ring brooches, ball and cone danglers and silk ribbonwork. The object had been requested for loan by the Eiteljorg Museum of American Indians and Western Art in Indianapolis, IN. The NMAI conservation staff felt that the return of this robe to the Miami community justified the exceptionally long hours required for this treatment. The major problem was copper corrosion on the white metal and associated staining on the wool and silk. There also were tarnished silver components and deteriorated silk ribbonwork. Although no treatment records exist, conservators suspect that during a previous treatment the metal was cleaned with a proprietary polishing compound and then coated with a lacquer, which left residual staining on the wool around the decorated areas. Nearly the entire conservation department assisted in the time-consuming cleaning of each individual metal component. Localized solvent cleaning using a hand-held vacuum suction plate successfully reduced associated staining of the wool fabric. Creases in the silk ribbonwork as well as in the wool fabric were flattened in a separate treatment phase.