I realize this is off subject, and for those that have no interest
I apologize, but for those of you that expressed interest in the
lithograph restoration project scheduled for the Currier & Ives site,
one of the two prints is undergoing restoration now.  There are
preliminary pictures of the print and the tools/equipment/gasses used
in the process at:

    http://www.currierandives.com/restorb.htm/

I should have more photos in the next week or two.

Scott Currier
http://www.currierandives.com

 [ The Currier & Ives prints are themselves interesting images of
 [ Americana, and your techniques and explanation (I hope!) make the
 [ project well-within our interest span.  Thanks for telling us.
 [ -- Robbie