Can Hoid compound the Metalic arts?

[AerionBFII he/him]

I’ve taken a bit of a break from the cosmere and I’m a little rusty. I feel like I’ve missed 10,000 WOB’s and I am trying to refresh myself and catch up. 
 

It’s long been previously theorised Hoid has access to Feruchemy and it was assumed he was a Feruchemist but it was later revealed he simply has unkeyed metal minds.. That’s how he uses ferchemical powers  

Hoid has the full powers of a powerful Allomancer after ingesting the L bead and we now all know he has un-keyed Metalminds but I’m a little foggy on how they operate. 
 

Is he capable of refilling his un-keyed feruchemy metal minds himself and being able to burn/compound for twinborn powers? 

[Oversleep]

If a metalmind is unkeyed, any Allomancer (of that metal) can burn it and Compound. However, without the Feruchemical ability they won't be able to store the result for later.

If he has the Feruchemical ability (regardless of the source), he can both store and tap it normally, so in conjunction with his being a Mistborn it means he is can Compound like a regular Compounder.

[Wandering Shade]

Any Mistborn could burn unkeyed metalminds to Compound, but if Hoid did that then he'd lose the metalminds and be unable to make more since he's not actually a Feruchemist. I don't think Hoid would do that unless he really needed to.