- Anodizing metals and metal products for the trade
- Buffing metals and metal products for the trade
- Chrome plating metals and metal products for the trade
- Cleaning and descaling metals and metal products for the trade
- Coloring metals and metal products (except coating) for the trade
- Depolishing metals and metal products for the trade
- Electroplating metals and formed products for the trade
- Gold and silver plating metals and metal products for the trade
- Grinding metal castings for the trade [2007]
- Laminating metals and metal formed products without fabricating
- Pickling metals and metal products for the trade
- Plastic, glass, or other media blasting services
- Plating metals and metal products for the trade
- Polishing metals and metal products for the trade
- Sandblasting metals and metal products for the trade
- Tumbling (i.e., cleaning and polishing) metal and metal products for the trade
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