Thanks Wayne! Would you suggest I mix white into my main camo colours, or leave them and mix back into the roundel area?
A small amount only to just tone them done a little would be a good start then use the original paint for the roundel area.
The difference would depend on how long the aircraft had been in service?
But you are looking for just a subtle variation...
Now, you could try a test on the inside of the wings (or fuselage) with a small amount of paint that is as described above AND also without the white and add a tiny amount of black to darken the painted over area.
On the inside of the wings you could at least see the effect, pick what you like and THEN glue the wings together! your sample painting disappears....
Then you can get on with the real work!