Having landscaped and undercoated my Titan bases, I used Basilicanum Grey contrast paint as a basecoat.
This is the Warlord base.
This is the Reaver base.
Quite pleased with the effect of the contrast paint.
As with my Asuryani Flyers the next stage after giving the Adeptus Astartes models for Aeronautica Imperialis a white undercoat was to think about the colour scheme. I have the models from the Wrath of Angels and I now have a Thunderhawk as well. I did think about Ultramarines blue, then Salamanders green, but in the end decided on painting them up as Grey Knights. Forge World had a display of a Grey Knights Thunderhawk at a GamesDay event which is what inspired me.
I think this could work, however they used a grey colour scheme rather than the metallic finish of the Grey Knights themselves.
So I gave the Storm Eagles a basecoat of Basilicanum Grey contrast paint.
I did the same with the Xiphon Interceptors.
The next stage will be that heavy dry brush and then a lighter dry brush to draw out the highlights and make the models look more like the Forge World Grey Knights.
After that it will be detailing the hull (with red), the engines and weapons.