I did get some smoke cutting 304 ss on the lathe, I used Ridgid cutting oil cut a bit with stoddard solvent, fire wasnt a problem but the smoke was at times.

I dont get any smoke on the mill but I am only cutting 6061, however its something to keep an eye on thats for sure.

I am also from the "era" of the oil, kerosene with lard mixed in etc, never had a fire that I am aware of, but it had an odor all its own at times,especially monday mornings after sitting all weekend.