As industrial oil, hemp oil has a number of useful applications including that of a natural wood stain. At its most basic, unrefined hemp oil acts as a simple drying oil. It penetrates, hardens and preserves wood, and provides a long-lasting finish. And like any other stain, it can be used craftily to darken wood color, to accent the grain, to match different pieces of wood and to help accent details. One of the most important natural features of hemp oil as a wood stain is that it is low-to-no Volatile Organic Compounds (VOCs).