Head of Christ. Detail from Velazquez's Christ after the flagellation contemplated by the Christian soul. 1631.

This is one of the paintings I have entered in the Christian Art Show at the local Baptist Church. This painting of Jesus was inspired by: Head of Christ. Detail from Velazquez's Christ after the flagellation contemplated by the Christian soul. 1631.
The method used was one of rubbing back the second layer to leave the first lighter colour. This method was used by the masters of old to commence their more detailed paintings.