Shellac is a natural resin which is refined from the secretions of insects. Both the solvent extraction and heat refining methods of processing shellac are described. A brief history of shellac use, which goes back about 3,000, years is included. The characteristics that make shellac an excellent finishing material are identified. Primarily, shellac is very stable and durable and functions as a vapor barrier. In addition, since the shellac film forms by solvent evaporation it is relatively easy to remove and repair. Drawbacks to using shellac are also mentioned. It is recommended that users prepare their own shellac varnishes and instructions are provided for doing this. Three techniques for applying shellac - spraying, padding and brushing are described. When properly done a shellac finish can yield a surface of remakable clarity, depth and lustre.