Airfield modelling (Airfix / Hornby / Lego etc)

Weren't some towers only rendered up to the dado, with unfinished brick from there up?

Sorry I was stating the bleedin obvious there! I mean unpainted above the line, ie just natural brick?

Thanks! Well, about the rendering up to the dado line, my references are inconsistent (seems like some towers or RAF buildings had a tidier appareance than others!) But all seem to indicate that the building interiors were painted up completely.
Here are a couple of contradictory examples about the rendering. On reflection, maybe none of these rooms were located in a watch tower? I gleaned the files from the web.
Painted, not rendered:

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This one sure doesn't describe a control tower room, but yet:
media.iwm.org.uk/iwm/mediaLib/39/media-39946/large.jpg

Painted and wholly rendered:

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The duty officer in the tower at RAF Catfoss in Yorkshire keeps watch while an airman signals to an aircraft using an Aldis lamp, April 1941. Catfoss was home to No 2 (Coastal) OTU.
This latter has a different window configuration than the usual wartime design... maybe it's one of the more involved buildings from the prewar period?

Contemporary pictures of RAF Elvington show a mixed option: rendered up to the dado line and exposed brickwork painted up to the roof.
I'm spoiled for choices!
D.

Thanks! The rendered up to the dado it'll be. I eyeballed the dado height up to 1.2 m high. Am I too wrong about that?
2nd question: the stairs steps were also covered in linoleum as the rest of the floors?
3rd question: The doors, door frames and window frames seem to be frequently painted (in the decaying abandoned buildings) in a sort of darker version of the green of the walls. Is this a suitable wartime custom?
4) In the last picture I see that they have "blackout curtains". I assume that these could be fitted to all windows on a watch tower (even the roof observation hut) Is that correct? Are these curtains made of just heavy black cloth?
Sorry if this has been discussed elsewhere in the forum! If so, please direct me to the correct thread.
Thanks in advance!

Yes... I was aware of the evident innacuracies of the kit soon after I put my grubby paws on it... Yet I see it as a chance to make an interesting backdrop for other types of models, like vehicles, figures, ancillary equipment and diorama landscaping. I'm also interested to learn some architectural modelling techniques, like making different types of stairs, railings, inner structures and small furniture. For that reason I'll make my Watch Tower as belonging to a fictional RAF base (I've written a list of silly names to choose) in an indeterminate time period between 1939 and 1945 (as I shall change and add features as time allows). I plan to mount the building in a reasonably large base (let's say no bigger than A3 size) to have space to add a couple of hutsand areas of both tarmac and grass.
Thanks for the answers!
D.