Wood oil is popular because it highlights the structure of the wood and is easy to use. Unlike traditional surface coatings such as nitro varnish, polyurethane varnish, or water-based varnish, which create a separate layer on the surface, wood oils penetrate deep into the wood structure. The penetration of the oil into the wood allows it to become an integral part of the material and preserves its natural, authentic appearance and structure. The appearance of oil is the complete opposite of the appearance of varnish. Varnish can appear somewhat “plastic” and artificial, especially on high-gloss varnished surfaces.
In addition to aesthetics, oils that penetrate deeply into the wood can also have practical advantages. Certain wood oils strengthen the structure (Osmo Polyx, Hartol Lux), which can make it relatively resistant to mechanical damage. With varnish, the wood does not gain in depth hardness, as the protection is only on the surface. In addition, repairing oiled surfaces is much easier. Minor corrections can only be made with local, spot sanding and re-oiling. With varnish, spot repairs are quite difficult, as the repaired part will most likely stand out from the rest of the surface. In most cases, complete renovation of oiled surfaces is also possible at home, which is also much more economical.
Wood oil allows the wood to “breathe”, meaning it can expand and contract naturally with changes in temperature and humidity without affecting the surface. This “breathing” of the wood allows it to age naturally and develop a patina, without peeling, as can be seen with varnished surfaces.
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