I think you'd need Duralumin to push that hard.
no, store 11 tons of weight in the iron as a feruchemical misting and shoot coins as a steel misting while using the stored weight.
That only affects how much force you can take, not how much you can push. Keep in mind that Vin needed duralumin to do massive pushes like that.
Flaring iron or steel makes you push harder. Using it with duralumin further amplifies the push, but there's still a limit.
no no no. not flaring. the basis of steel-pushes and iron-pulls is weight. a feruchemist really does affect weight, the feruchemist's weight physically increases. When Sazed was holding off the Kandra in HOA he used iron to hold all the stored weight to keep the door shut. Also, like I said, a basic fact of allomancy is that iron and steel is based off of weight. if you take the ability of feruchemical iron and allomantic steel and put them together you get the result of throwing metalk with your now increased weight.