What is Polyurethane? If you’ve ever sat on a sofa, lounged in a recliner, or taken a seat on a bus, you’ve probably already interacted with polyurethane. It’s fair to say that nearly every ...

If you don't know whether the existing finish is polyurethane, place a cotton ball saturated with denatured alcohol and another saturated with nail polish remover (the acetone type) against an ...