I have in my possession a WW2 katana. I've recently gotten it evaluated. It is oil tempered and not hand forged steel. Basically the cost of restoration is more than the blade is worth. I had read that back in the day tantos were often made from broken other blades. My thinking (though it seems like sacrilege), is to make myself some tantos. Is this feasible...or unholy.
http://s1360.photobucket.com/user/maxxxrivas/slideshow/
http://s1360.photobucket.com/user/maxxxrivas/slideshow/