Painting Helmets

[Iron Father Ferrum]

So I figured I'd come to you guys for a Chapter-specific painting question.

 

I finally found the motivation to put paint to brush to model, and I started working on my Honor Guard models.  No sneak peaks (I want to wait until they're finished to post any), but suffice to say that I'm using the most-techy artifcer armored models I could find, aka the new(ish) Techmarine models, with arm swaps for weapons, obviously.

 

The question is, what color do I paint their helmets?

 

The rest of them are the standard black, highlighted with gray, that I used on this lot:

 

http://i62.photobucket.com/albums/h96/DTRI/Iron%20Hands/Leaders/IMAG0242_zps054babd1.jpg

 

 

Each has a Mechanicus shoulder pad with red, and the Chapter pauldrons are standard metallic-lined with white iconography, but I'm stuck on how to paint the helmets.  More red, to show more connection to the Mechanicus?  White, as the Codex-approved helm color for veterans?  Stick with black?

[Bannus]

I kinda like the way GW is portraying the vets: a white helmet stripe.

 

As an alternative, I would consider painting them in the oldr Legion colors.

[Iron Father Ferrum]

I had actually thought of that -- heavily inking down a silver base coat -- but I decided I wanted them to remain coherent with the rest of the army.  I suppose that I could do the white stripe. . . I'll test-paint it perhaps and decide from there.

[jokaero weaponsmith]

I think that red would link them with the admech too much.

Unsure as to how you have painted your apothecary but white helmets may make them look too much like your apothecary.

So either white stripe or silver stripe or maybe muted silver helmet with black stripe ?

[Iron Father Ferrum]

I have no Apothecary; Honor Guard don't get them, just Command Squads.