lacquer

a black resinous substance obtained from certain trees and used as a natural varnish

a hard glossy coating

A varnish, consisting of a solution of shell-lac in alcohol, often colored with gamboge, saffron, or the like; -- used for varnishing metals, papier- maché, and wood. The name is also given to varnishes made of other ingredients, esp. the tough, solid varnish of the Japanese, with which ornamental objects are made.

coat with lacquer

To cover with lacquer.