Nice that is a very well done bunker it has that Imperial look about it !
I would love to see it painted, I don't know if you have picked a color scheme for it yet?
I tend to paint my bunkers and imperial defenses the color of the army I'm using! But, I do have
2 imperial guard army's a and 3 Space Marine army's so it would be hard to pick just one army color scheme, I might just paint it a standard military green (or whatever terrain best suite the cameo like like sand color for desert and so on) with wethering and blast marks because it will not match all my army's It would be more like a Imperial bunker from some long ago campaign, but is still standing? So it wouldn't have to match your army for say
any ways I'm sure it will look awesome no matter what colors you go with! Looking forward to seeing it!