This sample shows the same single piece of siderail Danish c.1880. The lightest spot is unrestored wood. The deepest color is linseed oil/light brown wax finish and the middle light brown is light brown wax.
I have placed this piece of wood against deeper backdrops to give you an idea of the difference between a light brown wax and a piece that would be oiled then waxed. The oiled piece will continue to darken somewhat more over time, the waxed section will remain pretty much the same.