So off to Mr Google's wonderful translator. The first was something rather plain - Gorlovka Steel Works which worked out to: "Горловка Ϻеталлургический Завод". That seems simple enough. But making a sign that just says that would be.... boring. So back to Google to find something suitably officious. With that attempt, I came up with this.
A little more thinking and I decided that I can do better. Make the signs so that they can be removable and I can use this for different stuff. So I scratched my head and came up with this.
Завод Детского Питания - Baby Food Plant
and
Государственный Индустриальный Завод - State Industrial Plant
and because I just read the recent Stephen Hunter book Даллас Kнигохранилища - Dallas Book Repository.
Anyway, I would probably drop the text from the image and just print it and center it on the building. But how to mount. My thought is to glue some steel washers to the back of the signs. Then use magnets on the back to hold them in place. Anyway, its a thought.