two little sisters step by step oil painting

I finally added some color to the black and white portrait of the two little sisters by Bouguereaux.
Just the first color layer and it has to dry before I can add some more color. The white of the flake and titiaan  white paint lights up a bit but that will vanish when I add some fleshcolors (I hope) And of course a lot of detail has to be added too. Still a long way to go.
Here you can see some of the steps of the painting process.