Is there a truth to make knives from files without annealing and heat treating, and temper in oven? The files come hardened from the manufacture already as we all know. Now, is it possible to take an old good brand farrier rasp file and just begin hollow or flat grinding and constantly dipping in water to cool, continuing process of shaping knife and polish and prepare handle holes to final blade edge to produce a knife as hard as it was from the factory? Without doing all the annealing, heat quench, temper in oven etc. Just as using a saw blade and cutting it to shape and finalize the knife from it and still keep its factory hardness. Rey in Texas