Lots of clamps!
I think there were 9 small vents and 8 Large ones.
These were fussy to paint even though the scheme is simple.
The important part is to assemble the vents so that the smaller MDF portion is precisely centered on the larger resin bit and the overhang is even all the way round. This has the effect of lining everything up nicely with no adjustment required during the clamping.
The White Formula is: Graveyard Bone (Reaper (R)) x2 over Black Primer, Dry-Brush Splintered Bone (R) edge with Storm Shadow wash (Secret Weapon) wash interior areas of vent grilles with Storm Shadow on both large and small vents.
Next up for Hab 5 are the ramps to the vehicle doors and the resin upgrades to that same area. After the ramps we'll be moving beyond the "Rough Guide" to do the remaining interior details, access ladders, additional air handlers, figure out what to do about the area around the side door that looks unfinished and out of place... and finally... add the acrylic light fixtures to the outside. That should finish the build except for any weathering that I decide to do later. That will be done as a batch of buildings to help me keep the effects consistent.