Thanks.
Yes, that's the curse of the "hero scale" for WH40K. But I used these in other WH40K displays and in the end they work out fine. I hope I make this happen here, in the kind of scale mix here too.
Again, thank you for your kind words and support.
I feel like I'm making some progress, but experienced some set-backs too.
Last week a good and dear friend, Christian Koppmeyer, died at 52 (https://www.facebook.com/groups/advancedsquadleader/10153999329070029/?notif_t=like) .
So quite some up and down.
But I started painting the diorama.
First evening the concrete received a blue-grey base color.
[ATTACH=full]61231[/ATTACH]
And I added some yellow warning lines.
[ATTACH=full]61232[/ATTACH]
The next evening I was able to add details to the warning lights and the small num-pad on the side of the man-door.
[ATTACH=full]61233[/ATTACH]
In my vision of this scene I always envisioned a large Imperial logo on the wall.
So I started to paint this on the rear wall.
[ATTACH=full]61234[/ATTACH]
And the name of the facility.
[ATTACH=full]61235[/ATTACH]
But together with the sliding door....
[ATTACH=full]61236[/ATTACH]
not so good 
So the next evening I gave it another try and ended up with this.
[ATTACH=full]61237[/ATTACH]
I like this much better.
So I added another warning slogan (Caution. Gate opens and closes automatically) to the front wall.
[ATTACH=full]61238[/ATTACH]
Another evenings work was the painting of the sliding door.
Weathered and with some German labeling. (The pencil lines are no longer visible
)
[ATTACH=full]61239[/ATTACH]
It reads:
"Versuchsanlage Rheingold" -Test facility Rhinegold
and
"Sonder-Forschungsabteilung von Sonnenberg" - Special research facility "von Sonnenberg"
[ATTACH=full]61240[/ATTACH]
Next was the gate.
Again weathered and with labels.
[ATTACH=full]61241[/ATTACH]
And mounted into the diorama.
[ATTACH=full]61242[/ATTACH]
The running track and the power cable for the crane got its base color.
[ATTACH=full]61243[/ATTACH]
[ATTACH=full]61244[/ATTACH]
And finally I started to paint the first items.
[ATTACH=full]61245[/ATTACH]
Well, this is as far as I got.
I hope you like it.
I look forward to your C&C.
Cheers
Klaus