Hey how does everyone go about making knives from hardened steel? For example a wrench or a saw blade. Is it hard to keep it cool enough that you don't lose the hardness or should I grind to my hearts content and then normalize and heat treat? I don't have my forged burners built yet so I'd rather keep it hard. Also when you grind and get that blue colour is that the area that lost hardness or will the area around it be soft even if it doesn't change colour?