[Christ]

Ben, I might be wrong about this, but the only time I remember smelling OZONE is when the coating on cards and circuit panels is melting or being heated. I remember the initial coat process when I was working at EIT, the whole room/area/floor of the building smelled like OZONE because of the heaters that kept it liquid.

I don't believe that arc'ing between lead, or lead and steel, or lead/steel/copper, any variant, etc... will make that smell. Still, could be full of it, too.