Thaks guy, the mix was:
after the Acrilic undercoat I used for the base oil color: titanium white, a little of Mars Yellow, and a touch of Lampblack) with a little of Venetian Red, these mix give us a pink color really ugly but you can add some Raw sienna to "kill" the pink tone and some of Raw umber to "cold" a little more the tones.
After that using "wet on wet" tecnic,
Shadows:Burnt Umber, Raw Umber, Casslerbraun (de Schmincke, gama Mussini)
Medium tones:Raw Sienna, Burnt Umber, y Burnt Sienna
Highlight:Titanium White
Tha´s all
Hope it help
Cheers
Ed :lol: