- Etching and engraving (7)
- Engraving jewelry, silverware, or metal (3)
- Etching on metals (3)
- Etching, photochemical (2)
- Painting, coating, and hot dipping (6)
- Coating of metals and formed products (6)
- Coating of metals with plastic or resins (2)
- Enameling, including porcelain, of metal products (5)
- Galvanizing of iron, steel, or end-formed products (1)
- Jewelry enameling (4)
- Lacquering of metal products (1)
