I'd rather have a whole knew set of craftable "Chaos/Eternal" weapons. It would still be a ecto sink and people would want them for their e-peens. Its a win/win situation! (win/win/win if they are able to be put in the HoM

).
Since the idea was made up with the want of a gold/ecto sink, here are other ideas I have/have seen mentioned before:
In simplest terms, have 1-2 sets per campaign able to be crafted and put in HoM.
Prophecies:
Deldrimor (just needs to be able to be put in HoM)
Titan [The weapon skins would work the same as the Titans themselves (they change appearance based on the area), craft at Glint after Titan Quests, Materials could range from Molten Claws (come on, they need a use

) to nearly anything, as they can look like anything. The rare material should be Ecto as Titans are "tormented souls." Best crafting materials for these that I see, Ecto, Wood, Iron, Molten Claws (say 25? Don't see why not) 5/10k]
Factions:
Celestial: [Crafted from Ectos, Sapphires (they have a sapphire look, kinda), and Spiritwood Planks, maybe wood or iron as well, for the common material addition]
Zodiac: (Crafted from Spiritwood Planks, Iron, and Ectos)
Nightfall:
Tormented: (already being put in HoM soon)
?Margonite?: (couldn't think of what else would fit, other then maybe Ancient, but I think Margonite fits better. Would have a look like the energy parts of their body with some skin/metal-like textures, basically a mix of Plaugeborn and Chaos/Eternal, craft from Ecto, Iron, and idk...)
Eye of the North:
Destroyer: (Taken care of)
?Slavers'?: (Can't think of a better name, very little things to go off of in EN. These could have skins that arn't like each other, but all having the same name. Crafted from various materials.)
Core:
Eternal: (Crafted out of Spiritwood planks and Ectos only, uses Chaos Axe, Storm Bow, and all existing Eternal weapons, along with whatever is missing of course :P)
Obsidian: (Already got an Obsidian Edge, why not have other Obsidian weapons? Crafted from Obsidian Shards, Onyx, Iron, and Steel, this would be the priciest, along with the Eternal set)
Prices can range from 5k to 20k, depending on the amount/type of materials used. Eternal and Obsidian would be the most expensive to craft and probably should cost 15k with those materials, and at least 15 of the Rare Materials.
Thats just my thought of a money sink, which would probably have more favor then just "making things shiny." Although the idea of giving weapons an elemental look would be good (the lightning, rock, fire, ice things, but what about my bloody vampiric weapons, would love to see blood dripping off of them

).