Read the Bible. It reveals all of the mysteries.
Does it reveal the metallurgy?
Better than that: It reveals the worthlessness of metal idols and the wicked pagan practices that God detests.
I suspect that this is one of those.
So Bible doesn't cover mysteries of metallurgy.
and doctors never covered your old man's corpse
with a sheet, coz he was never clinically dead.
but you gunna keep pushing Jesus wizard tales.