If the cel is really that disappointing, I would 
send it back.  If you buy a cel that you believe 
to be in good condition, and then discover it has 
major imperfections, I think you have the right to 
contact the seller/dealer about returning the cel 
for a refund.

Unless you're in a situation where you absolutely 
can't return it, or have no way to contact the 
seller regarding it. (like if you bought the cel 
from Japan through a deputy service)  

I wouldn't risk seperating the layers... it sounds 
like they're pretty melted together.  And if you 
do, you risk harming the cel even further.  

But like many people on this board have said 
befire... ultimately, it's your cel, and you 
should do what you think is best.  ^_^