As everyone is mining gold, for iron and coal someone has to pay even as much as for gold to get some from other players.
I understand, that not everyone who crafts will be able to get that much money (to get steel for example) to improve their metallurgy skill.
So here is my suggestion to solve that problem:
Weapons and Shields are made from Steel, Bronze, Iron and even Gold.
I'd wish to be able to melt those items down to molten Steel, Bronze of whatever they are made of.
So for example; when i melt a Broad Sword i'd get one molten steel. (For a steel stock are then 10 swords needed).
What do you think of this - because it'd be a real improvement and not that hard to implement. (well, at least not as hard as implementing shield handling)