Meteoric iron immunities

[naloth]

Originally Posted by Varyon

Meteoric iron isn't antimagic, it's just unaffected by magic. Note this also means a meteoric iron weapon will pass right through a magic force field, but if you're using magic to simply strengthen the armor you're already wearing (or your clothes, or your bare flesh), the strengthening effect is just as effective against the meteoric iron weapon as a weapon of terrestrial iron - the spell isn't affecting the weapon, it's affecting what the weapon is striking.

That's a questionable line. Is the strengthening effect due to a magical coating or magical infusion that dissipates on contact? A barrier could just as easily be defined as some sort of naturally strengthened effect (air stiffening). How would it work on elements that are being moved or shaped magically?