Continuing grumpily (ooh, I do hate having to learn new workflows - I much prefer regular threads where attached pics appear in the preview and can have commenting text added), this is what they look like after painting.

Rail grey wall and second-class bulkheads, purple upholstery mixed from railmatch crimson and (less) rail blue - I think I'll use faded rail blue next time, and aluminium rack supports although those aren't noticeable. White antimacassars brushed on. For the moment, no mirrors, maybe I'll add some if I find suitable material, maybe I won't.

The photos show that the base of the apertures I cut out is ragged where I used drills to break it off, and the verticals aren't, but I repeat that nobody will notice.