The oil finish leaves the surface treated very "natural" to the eye and touch, and hardly alters the original breathability of the wood. It is extremely long-lasting and can, if necessary, be easily re-applied. It is even possible to re-apply it in only certain areas. This characteristic also makes it suitable for areas subject to wear and tear. After installation and extraordinary maintenance, the finish is obtained with a special protective product (A-Lungo). In addition to ensuring long-lasting effectiveness of the treatment, with each application it renews the surface, giving its original sheen. We have only ever used biocompatible oil.