A scar? Interesting, I hadn't considered that the glass might affect something like that. Is it only the scar tissue itself that has changed? None of the skin around it?

[ Sorry if she sounds a little too fascinated by that--it's an interesting thing to consider! ...When you don't have any skin of your own. ]

Pun intended, I hope. But of course, that was the reason for the 'if you know' addendum. I don't expect most people to be sure of how strong it is, but it could help to hear from those who do.