here's a reference to how some scenes are
being cleaned up, including han shot first,
with avisynth script and settings:
============================
http://originaltrilogy.com/forum/topic.cfm/cleaning-up-dirty-frames-for-scenes/topic/14044/
as referenced here:
-----------------------------
also, discussions on color matching:
---------------------------------------------
http://originaltrilogy.com/forum/topic.cfm/Methods-for-colour-matching-colour-grading/topic/9430/
later
-1