Unlike lacquer, shellac and varnish, which have been around for centuries, polyurethane is a product of 20th-century lab technology. In some ways, polyurethane is better than traditional film coating.

Once you’ve applied this, make sure to add a clear topcoat, such as the Minwax Polycrylic from Amazon. “This will give it extra protection against peeling in places like kitchens and bathrooms that ...