Evolution of a painting

John Miller's viewing program cover. I put a grid on the photo to get the perspective correct. (John passed away last week from a brain tumor). 

I first drew the picture with pencil. This is after the initial application of paint.  I try to get the
correct value and color the first try (less work to correct).

What I've finished so far.  The face is the most important part
so I've left it till last.  I have to decide where to put the darks,
in order to have balance. I am in the process of learning how to remove color and add color -  which can be both fun and frustrating.