Hey guys,
remember that place I posted about that does 
restoration?  Well, they also can unstick your 
sketches from your cels, safely without ruining 
either part.  Supposedly the procedure takes 
about an hour, and the cel usually doesnt have to 
be gone long, about a few weeks.  I have one cel 
that has the sketch stuck, so I'll be sending 
that one in!  Just wanted to pass that along tho, 
see you!

http://www.srlabs.com/index.html