I’m currently doing this one - though, to be honest, few people really ask what happened when you have visible “flaws”… most do not dare to, sadly 
I’m kinda considering that one, too… or a nice tattoo, at least for the knife edge something binding-rune-like would be fitting (they usually have a big straight line as a base )…
But to be honest, I’m still not so sure if my employer would accept that. Maybe when I’m finally self-employed and willing to prove that bodymods don’t scare away customers 