Creating metallic or iridescent finishes on porcelain sculptures involves a blend of artistry and technical precision. Artists typically achieve these effects through specialized glazing techniques, including the application of luster glazes, which contain metallic oxides like gold, platinum, or copper. These glazes are applied after an initial firing and then fired again at a lower temperature to create a shimmering, reflective surface.

For iridescent finishes, techniques such as vapor glazing or the use of interference glazes are employed. These methods manipulate light refraction to produce a rainbow-like effect. Another approach is the reduction firing process, where the kiln's oxygen levels are controlled to create unique metallic sheens.

Advanced artists may also layer multiple glazes or incorporate mother-of-pearl or mica powders for added depth. The key lies in precise temperature control and experimentation, as even slight variations can dramatically alter the final result. These finishes not only enhance the visual appeal of porcelain sculptures but also showcase the artist's mastery of ceramic chemistry and firing techniques.