Sanding provides a method for smoothing an installed floor, compensating for unevenness of the subfloor. Additionally, sanding is used to renew the appearance of older floors. No beveled edges, as seen in some premanufactured prefinished floors, will be evident in a sanded floor. Sanding using successively finer grades of sandpaper is required to ensure even stain penetration when stains are used, as well as to eliminate visible scratches from coarser sandpaper grades used initially. Prior to modern polyurethanes, oils and waxes were used in addition to stains to provide finishes. Beeswax and linseed oil, for example, are both natural crosslinking polymers which harden over time. Modern polyurethanes, and polyester resins, used occasionally, are superior in toughness and durability.
Becoming popular in recent economical troubles Wood Refinishing is a sandless alternative to refinishing wood floors. In most cases the work can be done in one day and in some you can walk on your floors the same day.