When the Red Lotus captured Korra and we’re trying to kill her in the Avatar State, Ghazan metal bends mercury into Korra’s body. That sounds pretty self explanatory, but why then could Bolin not metalbend? It was building all season how Bolin couldn’t metal bend and how he just couldn’t do it and then for him to be able to lava bend. It makes the viewer think that Bolin couldn’t metalbend because he’s a lava bender. Lava is messy while metal is refined. This at least builds in my mind that one can’t be both. Except Ghazan was both? Obviously he wasn’t bending solid metal but this still doesn’t make sense. Could Bolin have been a metal bender or not?