I would imagine it is the same kind of material used in sunglasses and what not, looks good whatever it is. And yes, that was my point, SS obviously have the best sculpt going including the hammer effect you mentioned as they had access to the original bio's. So why would they release it without finishing it?! boggles the mind really as it could have been an incredible piece with a little more work.
I have emailed SS product suggestion department about developing such lenses for the scar and celtic, i would happily buy both if they did this but i doubt little old me will be listened too. Perhaps if more people voiced their complaints they might stop being so cheap with us? I for one hope things improve for this line as my Wolf is my grail piece. Id love an elder bio etc of the same quality, unfortunately i can't see it happening.