So the first sets of twelve metals are all focused of the burner. The burner gains the effects and powers of the metals the burner can push or pull metals, the burner and sooth or riot emotions, etc. The set of sixteen new metals I am theorizing don’t target the burner but rather someone or something else that is either near or in contact with the one burning the metals. Such as with Chromium and Nicrosil which are similar to aluminum and duralumin, but the target of the effects changes. An example of an effect of changing the target with a parallel metal to iron could redirect the pull to an object that’s in contact to the burner similar to one of the lashings in the storm light series. The powers of zinc and brass may turn inward giving greater control over one’s own emotions. Over all I am suggesting that new sets of metals could have similar effects by changing the target of effects of burning metals.