How Do I Know If Its Shellac or Varnish

Shellac and Varnish – To differentiate between shellac and varnish, use a cotton swab to apply denatured alcohol (ethanol). Varnish will react slowly, but shellac will dissolve right away. Oil – Wood with an oil finish will absorb linseed oil.

How do you know what type of finish you have?

Rub a small amount of linseed oil, using the cotton swab, into an inconspicuous spot on the furniture or trim. If the oil absorbs into the wood, the finish is likely oil. If it beads, the finish is shellac, polyurethane, lacquer or varnish.

What does a shellac look like?

Made from flakes of resin secreted by lacs (insects native to Asia) and dissolved in alcohol, shellac is typically available in clear or amber but can also be tinted to bring out a range of hues from golden oak to dark mahogany. It’s readily available at home centers, goes on easily, and dries quickly.