I just though I would pass this one so someone else won't step in it.
I was smelting down some range scrap the other windy day and dropped in a single coated bullet into the pot. I figured no big deal they heat them to get the coating to cure on them so in it went. The next thing I knew OH BOY what a stink it hung around for a good 10 or 15 minutes no matter how much I fluxed or dross removal. The one time I didn't wear my respirator and it bit me in the butt with fangs.