Thanks guys for all of your kind comments.
As for the hairspray technique, this was something new for me and both Des and Lance Carroll have indicated that it has application in WWI modelling too, particularly with cowls and leading edges. That being the case, I'm tempted to give it a whirl on the cowl of my Sopwith Triplane, which I hope to start soon. I think it could be particularly effective on the corrugated skin of the WnW Junkers J.1, a kit which I had absolutely no interest in until now. Guess what I'm buying next.

All I did was lay down a sturdy base coat of red primer which was Tamiya Hull Red thinned with lacquer thinner. Then I applied two light misty coats of aerosol hairspray.

The camouflage colours were also Tamiya acrylics but thinned with tap water so they'd be easier to remove. When they were dry, I brushed water on the areas where I wanted to remove paint, leaving it for a minute or two to soak through to the hairspray. Then I used a flat, stiff bristle brush and gently scrubbed away at the paint until it started to chip. The hardest part is to restrain oneself from getting carried away with the effect! Click on the image below for an enlargement to see what I mean.

If you compare the image above with one below, you can see how the application of filters and washes tones down the effect though.
Cheers,
Chris