Caesarion's right arm

This morning I painted Caesarion's right arm.

It is interesting to see the difference between their arms: Cleopatra's are smooth, on Caesarion's you can see the chisel marks clearly. The theory that there was plaster on top of the stone would make sense. These little holes would make the plaster stick better...

Men were usually painted with red skin, women with yellowish. As the stone in Dendera is yellow on its own, maybe the stone was already of the right color to depict Cleopatra's skin color? So no need to plaster and paint her arms?