Much is written about colours, markings, schemes and stencils of aircraft through history, but there are very few photos of people actually creating the colours (or painting the aircraft).
WAAF with paint 1941
Here's one, thanks to a very interesting W.W.II British Commonwealth colour Flickr stream, well worth a further browse. At a guess, it's a Short Sunderland getting some new paint. Of course the picture raises more questions than it answers, as is often the case for posed press shots like this.