Duco was a trade name assigned to a product line of automotive lacquer developed by the DuPont Company in the 1920s.
Under the Duco brand, DuPont introduced the first quick drying multi-color line of nitrocellulose lacquers made especially for the automotive industry.
Duco was the finish applied to National String Instrument Corporation brand of resonator guitars c. 1930.
Duco coated is used in the plumbing industry to describe lacquered floor drains and other similar products.
Duco Cement is also a brand of nitrocellulose all-purpose adhesive originally trademarked by DuPont and now marketed in the U.S. by ITW Devcon.