It is general practice to lacquer the two plates and the pendulum with
special lacquer. Various shades are available depending on the style and shade
of case. Colourless is used for carriage clocks and 'All brass' clocks. The
remaining shades are used with wooden cases, with dark woods having dark gold
lacquer. Never lacquer the wheels.
A more recent method involves the use of wax polishes containing a high percentage of Carnauba Wax such as Clockshine. It is simpler to apply and unlike flammable lacquers, can be sent in the ordinary mail.
Repairing Your Own Clocks by Mervyn Passmore