Cleon
Legend
I think the standard kyton's Craft (blacksmithing) is really a "mistake" compared to the Craft entry in the skills section of the SRD. Blacksmithing applies to both weaponsmithing and armorsmithing, but those are listed as separate Craft skills. So, while I understand the desire to stay similar to the SRD kyton, I don't want to propagate the problems that the SRD kyton has. It's just another example of WotC's right hand not knowing what its left hand is doing.
Anyway, after that, are these mechanically done (and ready to de-red-ify)?
I'd think Blacksmithing is for crafting generic metal goods in the Goods and Services section such as crowbars, grappling hooks and - most pertinently for kytons - chains and manacles.
Weaponsmithing and Armorsmithing is for crafting metal goods in the Weapons and Armor sections respectively.