I don't have my books handy, so I can't recall if this is something I read in a publication, or from one of the devs in the O66 podcast, but:
Aren't there some rules for improvised weaponry? Just grabbing a random object and using it, or trying to construct something from random items? I could've sworn there was, but I'm not sure.
I seem to recall one of the devs saying something about it definitely having the Inferior quality, and likely having a rule where if enough negative results are rolled, the weapon could flat out break.
If there aren't any RAW about the subject, what are your ideas on how to rule this? I've got some ideas, namely the ones mentioned above, but I'm curious what others think about how it should play out.