"IF" those parts needing heat-treating are made from a higher carbon steel but improperly hardened then you DO NOT want to use Kasenit on them. Kasenite is a great product that I have used on many occasions but its use is only for low carbon steels.
Perhaps the reason that gunsmith doesn't do heat-treating is hat he has no way of determining what alloy the part was made of. There can be a world of difference in heat-treating an already made part of an unknown alloy & doing one which one has just made themselves.
