it probably seems like a good idea at first, but 
people will just trim the cels to get that part 
off of there, if they really want to cel it as a 
production cel. and of course, they can always 
try the usual sneaky methods of removing it, 
especially since it won't interfere with the 
picture.

i think that the only way to do it would be to 
ink "fan cel" or your signature on the side that 
you paint on, and then paint over it so that it 
shows on the front (like you already do with your 
stamp). maybe instead of using your stamp (since 
you say it's too big), you could just ink "fan 
cel" underneath the paint, or underneath your 
stamp. just some suggestions...

haruna