Back in the times when I crafted my windslord, I was mistaken in thinking that I could force the impurities out of my craft with just hammering them down. This time, I simply ignored all the flaws in the blades and shifted them between forge, anvil and back to the forge for as long as it took me to properly shape them into slightly different forms.
If I were to auction seven blades looking exactly the same, everyone would quickly understand that the craftsmen that I got them from was able to create such weapons mechanically and repetitively. By adding them a little uniqueness, I would be able to cheat are the potential customers that they were actually a one of a kind works!