About removing the sketch, that is.  Since it's 
so old, even normal methods of removing sketches 
from cels can be risky.

About the cel itself... I'm FREAKING jealous (but 
in a non-combative way)!!!  Where did you get it 
(and for how much, if you don't mind telling)?

Sigh, all I can do for now is settle for my only 
Minmei cel (from DYRL)... I won't post an image 
of it because the glory right now should be yours 
alone!  And trust me, in terms of rarity, yours 
is much much more impressive anyway.