This seems off. If it was clear packing tape you'd have no problem seeing where to cut and avoid the metal If it was so thickly layered it would have peeled off like a rind.
I would have just used a can opener on a SAK to do this. They can cut metal so a vent wouldn't be a concern.
I would have just used a can opener on a SAK to do this. They can cut metal so a vent wouldn't be a concern.