Alright. Decided to go a completely different direction with my Covenant ships.
The other scheme was just way too complicated and time intensive.
Base color is GW Runefang Steel, with a couple coats of GW Waywatcher Green glaze over the steel color. The gold areas are two coats of P3's Rhulic Gold over a base of Runefang Steel (repainted after the glaze was applied). The red markings are Ruby Red from Master Series Paints.
Covenant ships are traditionally a purple color, and I might try this same technique later with a purple glaze over the steel, but for now I like this color. Non-traditional, yes, but so are my UNSC. And to be honest, I have so much $#%@ unpainted resin/plastic stacking up that I need to start going with simpler schemes if I ever hope to have it done. Especially with Adepticon on the far horizon...
Comments and constructive criticism are welcome.