Hurricane panel lines?

[Feathered_IV]

Those are shadow lines representing the lines of rivets that secure the metal skin to the structural ribs underneath. Slightly heavy handed compared to the real thing, but certainly not representing panel lines as such. Two of the seven lines you indicated (number 3 and 7) are panel edges. The rest are rivet shadows.

Not so sure about the 'aluminium' showing around bullet holes in the fabric though...