Unkeying Hemalurgic Spikes

[Trusk'our he/him]

Simple thought here that came into my head recently. 

The Southern Scadrians have the ability to make their airships lighter in order to fly by utilizing Feruchemy. That means there is a way to make inanimate objects capable of storing Feruchemical attributes. 

So, what if you create a Hemalurgic spike capable of blanking its Identity with aluminum Feruchemy?

It would only last as long as the device using Feruchemy was in place (which might require Harmonium, though I don't believe we know for certain whether the airships' Feruchemy needs Ettmetal or if it's just the Allomancy) to actively blank it, making it less practical than blanking the donor's Identity during the initial spiking, but you can do this with older recycled spikes or do it quickly "on the fly", so to speak, spiking multiple people to steal power without regard for Identity contamination. 

Maybe you could even supercharge a single power this way, or get a heavily Invested nicrosil spike. Bypassing Identity contamination for Compounding might be possible too.

Thoughts?

[Quantus he/him]

Im pretty sure the Airships use Harmonium to make objects emmit metallic arts, so anything using them will be costly at minimum. 

The main issue I see with this (if Im understanding the proposed process correctly) is that one you've Invested the metal to do anything feruchemcially, it'll be Invested enough to resist the Hemalurgic Charge.  That's a problem but probably not an impossible one, eventually.  

The other issue is that the metal that feruchemically Blanks Identity will Hemalurgically Shut Down all Powers as soon as it get into a Bind Point.  I think the latter effect would prevent any version of the former from taking hold.