I'm posting these in reverse order so that you, dear reader, can read them sequentially (hope that makes sense).
I finished the hive with one coat of masonry paint and then an artistic rendering of camouflage.
The masonry paint in breathable and flexible - so less likely to crack and flake off than, say, gloss or emulsion.
These are "tester" pots. I still have some left in the pots - so it goes a long way, on top of the white masonry paint anyway.
So here is the finished article. Not too pretty - but I think it will blend into the landscape better than arctic white! I'll post some pics when it's in situ.