Would Hans Landa's scar be unrepairable?

[Jophiel]

According to this site, skin grafts were going on in the 1940’s…

As the century progressed skin transplantation found more and more applications and techniques continued to improve. As the bodies immune system began to be better understood, treatments could be directed at preventing the bodies rejection of transplanted skin. As skin grating became more common and usefull, doctors looked for new sources of skin. Cadaveric skin became very popular, though it needed to be harvested quickly and treated carefully and extensively. In 1944 Webster begins experimenting with refrigerating skin, and manages to successfully store skin for as long as a couple of weeks to be used as a dressing for a burn. This revelation prompted the US Navy to establish “Skin Banks” at strategic locations filled with frozen skin.

I doubt it’d be pretty but a square of scarred skin would be easier to explain away as a war wound, etc than a swastika on your forehead.