Non Slip Polyurethane For Wood Stairs. There are two main points to remember when you are sanding and painting your hardwood floors & stairs: Polyurethane is a thin layer or covering that gives your floor protection.

There are two main points to remember when you are sanding and painting your hardwood floors & stairs: (1) the quality of the craftsmanship & (2) the quality of the polyurethane. Polyurethane is a thin layer or covering that gives your floor protection.