I guess thats the conundrum.
But to me, since the clothing still flutters with sorcerous wind as its struck by the chorae arrows, or since the rocks still spin around when they are struck, it seems to me that their magical enchantment isn't removed with the contact.
Also, we know that there is some distance affect of the chorae effect (I'm sorry for using affect/effect incorrectly if I did), so do certain parts of the body have less protection than others? Like if held in the right hand, is the left under less anti-magic shielding?
btw, does the chorae remove the mark? Does the salt pillar lose the bruise, and is the scarred battle ground of an arcane standoff healed? We know that objects that are worked, such as the ground hit by The Culling (or whatever its called when the schoolmen try to kill the sranc), bares the mark. The physical ground is not "reknit" when the chorae pass by, but is the bruise healed?