- Bonderizing of metal and metal products, for the trade
- Chasing on metals for the trade, for purposes other than printing
- Coating (hot dipping) of metals and formed products, for the trade
- Coating and wrapping steel pipe
- Coating of metals with plastics and resins, for the trade
- Coating of metals with silicon, for the trade
- Coating, rust preventive
- Dipping metal in plastics solution as a preservative, for the trade
- Enameling (including porcelain) of metal products, for the trade
- Engraving jewelry, silverware, and metal for the trade: except printing
- Etching on metals for purposes other than printing
- Etching: photochemical, for the trade
- Galvanizing of iron and steel and end formed products, for the trade
- Japanning of metal
- Jewelry enameling, for the trade
- Lacquering of metal products, for the trade
- Nameplates: engraved and etched
- Painting (enameling and varnishing) of metal products, for the trade
- Pan glazing, for the trade
- Parkerizing, for the trade
- Phosphate coating of metal and metal products, for the trade
- Retinning of cans and utensils, not done in rolling mills
- Rust proofing (hot dipping) of metals and formed products, for the trade
- Sherardizing of metals and metal products, for the trade
- Varnishing of metal products, for the trade
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