Some surface sanding to catch the light , some water resist for precision line work .

http://www.youtube.com/watch?v=zD-9v2-Gfes

http://www.youtube.com/watch?v=4_pSjaMjq-A

In response to my sketch video of Beethoven , I received a commission to fire-paint on copper , the composer Mauro Giuliani .
This video outlines the process I used to do the study, for this portrait .

http://www.youtube.com/watch?v=uThM9s6Mccg
In this video I anneal a small scrap of copper to a dark grey , and use ink to lay in a few initial marks , for the sake of this demo . Usually I would go much larger / more detailed , and use solely brush and water ; there is an example of this technique too , near the end of the video .