Wouldn't metal particles be passed out in stool in time? I don't even want to think about mercury!
We basically get rid of things in our blood via our bile, sweat, tears, urine, and creation of tissue that flakes off (skin), or it permanently become part of a retined tissue. We get rid of stuff in our gut by vomiting, pooping, and absorption (taking it in). We can get rid of blood by bleeding and giving blood.
I think those are about it.
There’s not a good way to get rid of metal except through urine or maybe bile, once it safely makes it through your tisue from ingestion or injection.