Thanks for the fantastic information about Dibond. I think today's artists do not use all of the incredible new material that is available.
About the drawing: once I have the certitude it is finished, I cannot change it too much. By changing the nose I might change also something else and else and else. Also sometimes the picture must stay for a while so that later on we can come back to it with a new eye.
Hopefully I still have an unfinished picture to start with, a group of portrait of 8'/8'.
http://www.fireface.com/firemen/grou...ostroverhy.htm