Makeup with laser

I am trying to make a small laser engraver work together with my cnc router. The router to cut away the material and the laser to add makeup. My attempt to use a marker pen failed because of the properties of wood.

For now I am quite happy. I would like some more gradient, but every wood is different so I have to do more testing. The small scale is adding a layer of difficulty. The face is less than 30mm in height.

Next I will try to make a car and use the laser to accentuate the edges.