The long work of altering the canvas began with some blackboard chalk, which leaves no permanent marks when used to show corrections on top of dried paint and can be easily blown off and even painted over. The markings are fairly rudimentary but I can already see that getting the position and structure of the eyes and eye sockets won’t be as easy as I had hoped.
The only thing that is certain is that there is a lot more work to do on this poor painting!
Chris