Establishments primarily engaged in performing the following types of services on metals, for the trade:
(1) enameling, lacquering, and varnishing metal products;
(2) hot dip galvanizing of mill sheets, plates and bars, castings, and formed products fabricated of iron and steel; hot dip coating such items with aluminum, lead, or zinc; retinning cans and utensils;
(3) engraving, chasing and …
Examples: Bonderizing of metal and metal products, for the trade, Chasing on metals for the trade, for purposes other than printing,
