A varnish is a resin dissolved in a liquid that is applied to wood, metal, or other materials to form a hard, clear, shiny surface when dry. It can also refer to the covering or glaze given by the application of varnish.

Varnish can be used to protect surfaces from scratches, abrasions, and chemicals. It can also be used to enhance the appearance of surfaces by providing a glossy finish.

Varnish can be applied using a brush, roller, or spray gun. It is available in various shades and can be tinted to match the color of the surface it is being applied to