In 1920 DuPont in the USA produced a thick pyroxylin lacquer that was quick drying, durable and could be coloured. It was originally called Viscolac®.
In cooperation with General Motors DuPont refined the product further and renamed it Duco.
Duco was first used by General Motors as a durable, quick-drying finish on its 1923 Oakland models.
It reduced paint finish time from two weeks to two days and soon became the standard finish on cars.
It remained in use until the late 1960s.
