Ever peel the skin off a model A deck lid?

Wondering if I'd be better off grinding the edge and rewelding the skin back on later...or peeling the flange back and re-crimping when I'm done?
I'm worried about bending up the outside of the skin if I try and pry back the flange. How have you fella's done it? I'm going to reuse the skin!

 

We pry em off. Eastwood sells raingutter pliers that work excellent if used properly. When done, just hem them back over.