Shellac is a natural resin that's derived from the secretions of the Lac bug--an insect that feeds off trees indigenous to India and Thailand.
FRENCH POLISH: SHELLAC, ALCOHOL, OILS & TECHNIQUE
Fine Woodworking 234 August 2013
How to Mix Shellac - FineWoodworking
Can you paint over dewaxed shellac? - Quora
Fast Shellac Finish - FineWoodworking
SealCoat (dewaxed shellac) with stain glaze
Shellac - FineWoodworking
Shellac lb cut? - Finishing - The Patriot Woodworker
Shellac - FineWoodworking
All About Shellac: My Favorite Easy-to-Use Finish for Beautiful and Durable Results