Varnish vs. Polyurethane
Varnish is most commonly confused with polyurethane.
But varnish is also different from shellac and lacquer.
Nowadays, many different types of varnish have been created to serve a variety of different purposes.
The Spruce / Jiaqi Zhou
Listed here are the most common types of varnish, as well as what distinguishes them from one another.
Because of its intended use, spar varnish was, historically, very flexible but not very durable.
Exterior Varnish
Exterior varnish is an example of modernized, modified spar varnish.
Sometimes labeled as spar urethane, it differs from true varnish.
Alkyd Varnish
Alkyd varnish is a highly versatile varnish that can be used both indoors and outdoors.
The main purpose of black varnish is to coat ironwork, protecting it from corrosion.
Oil varnish is simply a mixture of resin and drying oil, absent of a solvent.
Spirit varnish is quick-drying and highly polishable, but not nearly as durable as oil varnish.
Drawbacks of Varnish
When properly applied, a varnished finish is gorgeous.
Thin the Varnish
Generally speaking, the first coat of varnish goes on easier if thinned.
This will help prevent bubbles and runs on the surface.
Toluene Safety in the Workplace.OSHA Infosheet, United States Department of Labor Occupational Safety and Health Administration.
