Those metals acted as a "solvent-catalyst", which both dissolved carbon and accelerated its conversion into diamond.
Studio 1 in Newark hosted many rock and metal acts in the 1980s and 90s.
The charges orient at the interface to create an electric double layer; the metal then acts like a capacitor.
So I am led to believe that the metal merely acts as a catalyst to speed up a decomposition reaction.
By 1990, Mayhem was regularly wearing corpsepaint; many other black metal acts also adopted the look.
For instance the sea of electrons causes most metals to act both as electrical and thermal conductors.
Necro has also been known to reference heavy metal acts in his rhymes as well.
The album features heavy metal and rock acts with a few acoustic pieces.
But the metal in duratherm acts as an anticatalyst on the soup and cuts the power way down.
Then there was the Wamphyri fear of silver, which metal was a poison to their systems, acting upon them like lead acts on men.