Just a metallic smell? Nothing to worry about then, thats just annoying.
I get the same when I'm on a job making guitar parts (I make the truss rods that go in guitar/bass/acoustic necks to keep tension, along with the bolts that serve to set the depth guides on the special saws for cutting fret slots), takes several days for one job, machining the parts on the lathe, cutting up steel bars, drilling holes in the brass bits, tapping screw threads, welding the final parts together, scrubbing off the welding flux with a rotary wire brush type thingy, and by the time I'm finished, my hands always stink to high heaven of a mixture of that metal-sweat type smell, primarily from the steel I think, and of tapping oil, which has an extremely distinctive, although by no means unpleasant odor to it.
I don't like the metallic smell at all though. I can tolerate it, its not way up there on the list of awful, hideous stenches that make me instantly heave, like, for instance, opium poppy pod tea,or pod latex, the sickly-sweet reek of chloroform or dichloromethane, vomit, acetaldehyde, methylethylketone or worse, methyl isobutanone; di/trimethylamine (think acrid, decaying fish a thousand times over) hypochlorites (such as bleach), or chlorine gas itself.
On the other hand, I have a funny taste in terms of odors I find pleasant. I actually like the smell of burning sulfur (sulfur dioxide, SO2), at least, in concentrations low enough not to be choking, a respiratory irritant and suffocating, as well as the faint garlic odor of white phosphorus, and unlike chlorine, I find iodine quite pleasant; I2 vapor reminds me of the smell of the seaside.
Or in low concentrations, I even enjoy the rotten egg smell of hydrogen sulfide (although it is a deadly poison, acting in a similar manner to cyanides, and worse, after a period of exposure, paralyzes the olfactory nerves, numbing the sense of smell, making one think the hazard has gone away, if one is not aware of this particular property of H2S, so its one to be extremely wary of)
