Arenanet is seeking player feedback on what materials should go into the material storage on the forums. "Alright folks, here we go. I have said that we would look into the material storage system to determine if we could reduce the current restrictions on what is allowed to be deposited there. Here are some guidelines, to head off any paths that will not be fruitful for you:"
No Crafted Components.
No Keys. I totally understand how much folks want this but putting keys into material storage is not a viable way for you to get a key ring. Sorry.
No pure Salvageables. I’m looking at you, Lumps of Raw Ambrite.