ok, no models yet, but I have made progress on what will be the most time consuming part of this army... gold.
Normally what I do when painting gold, even large-ish amounts is slowly layer shining gold over a calthan brown basecoat, gives a nice warm colour. Unfortunately this approach takes AGES and if I had to paint 21 (yep, only 21 gold dudes in this army, 3 will be red!) whole models using this method I might actually consider stabbing myself in the eyes as an easy-out.
So, new methods required it seems, not keen on the time investment required for NMM (or for that matter confident in my ability as a painter to make a convincing go of it!) I've opted for metallics, my trusty airbrush and a bottle of Vallejo Model Air Gold (VMA 71.066 is what's on the bottle). Even over a black undercoat this stuff seems effective:

That's just a single really thin coat, left door in both halves of the image is with slightly more thinners than I think I should have used, right door is probably what I'll go for as it's solid-ish in one coat, should be pretty awesome in 2.
Only problem with the vallejo gold is that there's no real colour match with GW paints, so I'll need to use the same gold throughout, and just add silver to it for highlighting, relying on washes for 99% of the definition. For info, this is the kind of level of definition i'm looking at getting on every model (though maybe it won't happen *quite* like that):

Any hints/tips people can give me on painting large amounts of gold will be greatly appreciated!