With the proper prep and tools, you can apply a polyurethane finish to your floors for a glossy look that protects against scratches and scuffs.

Unlike lacquer, shellac and varnish, which have been around for centuries, polyurethane is a product of 20th-century lab ...

The key here is to make thin and consistent layers since too much of the polyurethane can result in uneven texture. Allow the finish to dry fully before sanding lightly using a fine-grit sandpaper ...