Here's a quick video on applying shellac. We use it before applying a sealer like epoxy or Waterlox. We highly recommend shellac for a base. It Is great for sealing the pores of the wood This helps you use less of your finish. We also recommend using a de-waxed shellac if you are gonna use shellac as a sealer. | Knock on Wood Custom

Step-by-Step Shellac Nails Tutorial