Linseed oil paints are some of the finest in the world. Used extensivley in Scandinavia, and high end artist paints. Was one of the original types, along with milk and vinegar paints. Works well on plaster too.
Is the only thing that stands up to direct desert sun, and hardens to a hard shell on wood. Fantastic on window frames and lintels, where it fills cracks, and strengthens thin crosspieces.
When you repaint, if you add a bit of kerosene or mineral spirits, it softens the old coat, bonding to it solidly. Not sure of coloring, but pre-mixed is VERY spendy from Europe.
Best thing for wood handle yard tools too, fills cracks, doesn't attract dirt, and highly uv resistant, unlike varnishes and urathanes.