You can find out about the whole cold iron thing on wikipedia, of all places.
I know you winked, but just for posterity and archiving, in case anyone cares:
Sure, but look at that quote and what surrounds it on links.
"In terms of protective charms, cold iron is the most familiar, but other things are regarded as detrimental to the fairies: wearing clothing inside out, running water, bells (especially church bells), St. John's wort, and four-leaf clovers, among others. Some lore is contradictory, such as Rowan trees in some tales being sacred to the fairies, and in other tales being protection against them."
(From 'cold iron' entry)
""Cold iron" is sometimes asserted to repel, contain, or harm ghosts, fairies, witches, and/or other malevolent supernatural creatures... Iron, particularly "Cold iron", was employed as a protective substance or charm against faeries. In various folklores, Supernatural creatures are held to hold an aversion to iron or even be harmed by the touch of iron. Conversely, amongst Asian traditions, there are tales of ironworking fairy."
"In mythology, the term "cold iron" is sometimes only applied to cold-worked iron of meteoric origin, or having fallen from a meteor, as such metal has never been heated by human agency. Mined iron must be smelted first, so such iron may or may not be considered "cold iron", depending on the source consulted."
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Does that really make a reliable jump to a solution for when a thing that's vaguely monstrous (which you probably can't identify from a casual encounter, BTW) is about to eat your face? 'Cause, hey, according to your "research", if the fae is from Asia, the iron thing may not work. And hey, what is actually cold iron anyway? Does my chef's knife count?
Misinformation, rumors, and contradictory information can damage the "availability" of a fact just as sure as being sequestered in a library can. It's easy to find just about anything out. It's harder to find out if anything is verifiably true.
(Side Note: The Stoker's Dracula thing is specifically called out in the setting as being practically a manual for the killing of Black Court vampires. So a concession has to be made there to what the Jim sayeth. Otherwise, I'd probably put vampire weaknesses in the same category as the factual efficacy of cold iron - material commonly written about it, with not a whole lot of it reliably lining up and therefore damaging the potential to verify anything except through detailed supernatural research. Hence, +1.)
-Lenny