Only one other fellow mentioned the metal becoming brittle, says not to use on barrels and receivers. Frankly, not being a metallurgist but being kind of common sensecal, I don't see how hydrogen could get deep enough into the metal to make anything but the surface brittle if even that. It would seem to me that the fellow writing the advice may have confused the initial creation of the steel rather than electrolysis. I followed the links through to the Surplusrifle forum and seems lots of fellows have done this to barrels and receivers and none mention baking afterwards.