Speaking of Logical fallacies....
Does the Stanford group, who actually did the work here and shouldn't be otherwise implicated in this, support your iron shell interpretation? Or are you hacking off a chunk of their research and pasting it to your hypothesis.
In all seriousness. You've neither made the case that there should be an iron shell expected at the surface of the sun, or that one exists there. It's a neat idea but it doesnt explain solar physics anymore than the theory of a metallic mercury shell explains a flourescent lightbulb.