Porcelain sculptures can be transformed into dazzling works of art with metallic or iridescent finishes. Here are the most common techniques used by artists and ceramicists:

1. Luster Glazing: This involves applying a thin layer of metallic oxide glaze (such as gold, silver, or platinum) to the fired porcelain. A second low-temperature firing bonds the luster, creating a reflective, metallic sheen.

2. Iridescent Glazes: Special glazes containing metallic salts (e.g., titanium or copper) produce rainbow-like effects when fired at specific temperatures. The interplay of light and chemistry creates a shifting, opalescent finish.

3. Reduction Firing: By limiting oxygen in the kiln during firing, metallic oxides in the glaze undergo chemical changes, yielding unique metallic or iridescent surfaces. Copper reduction, for example, can produce striking reds and greens.

4. Overglaze Decals: Pre-made metallic or iridescent decals can be applied to bisque-fired porcelain and fired again to fuse the design seamlessly.

5. Mother-of-Pearl Techniques: A diluted pearl essence solution is brushed or sprayed onto the sculpture, creating a subtle iridescence reminiscent of seashells.

Each method requires precision in application and firing to achieve the desired effect. Experimentation with layering and firing schedules can lead to breathtaking, one-of-a-kind results.