I like the idea to pre-shade with the wash/filter you've done in this post. Sounds like you're going to paint with the shades mentioned above. Do you plan to do anything next after painting or do you think the pre-shade plus paint alone will achieve what you are after.
I have just completed the primer/base coat over the black shoe polish and water wash with Stynlrez White Primer, mixed with several drops of Stynlrez grey primer and thinned just a tad with Reducer so the thick primer would shoot through the airbrush with a bit more transparency so the panel lines still come through.
Now I will proceed to mask areas for hull plating that I will paint with a darker shade of grey acrylic paint and will go back in with some grey wash after that to enhance a few details that I think need to 'pop' just a bit more after the base coat/primer. Since the finish thus far is a matte finish almost flat - I am toying with masking some additional smaller hull plates and shooting some Future onto the hull so I get some gloss aztec effects depending on how the light hits it.
I was debating whether or not to add some additional mechanical pencil lines ala the 8 footer, which would add an illusion of a grayer hull, but at the 1/5000 scale - I think not. You would not see such fine lines that far out from the actual ship.