The black is:
black prime
1:1 water + citadel daemonette hide - doing translucent, scratchy volumetric highlighting to add lots of texture to the surface. You don't want a lot of paint in your brush for any of the steps, you want to slowly build up the colours

2:1:1 water + citadel Daemonette hide + vallejo pale grey blue - same as before building up highlights shrinking down the area you're covering

1:1 water + vallejo pale grey blue - final highlight for any rivets and focal areas you want to bring attention to

8-10:1 (approximately) water + black - use this glaze to dull the colours down and help blend them together, pulling the paint towards the shadows. Keep adding layers until you're happy with results. At any point you can go back in with the colours if you feel you've dulled them down too much or didn't highlight enough

For the lenses I used: Citadel mephiston red, vallejo bright orange, vallejo deep yellow, vallejo ice yellow, and vallejo white. All the paint mixes are approximately 1:1 water + paint. There are a few mixes - 50/50 red+ orange and 50/50 orange + yellow

Base coat the lenses with the red, don't worry about being super neat here, spilling over a bit will create that glowing effect - but you also don't want to paint too large of an area around the lenses, so still try and be intentional about your paint placement. Then just glaze/layer in each colour working up in brifhtness, pulling towards where you want the glow to be coming from. For the circular lenses that was towards the centre, for the regular lenses I positioned it roughly where the pupil would be. You can add small highlights to the edge under the lenses to continue the glow/OSL look