LeeThorogood said:

I agree the ideal way to go would be colour correcting scene by scene, I've said this all along but at the same time I have my reasons for not doing it this way. :)

Lee, could you use a best fit setting for the film and tweak just the scenes where this setting results in undesired side effects e.g. the green on Artoo's stripes? This way you could avoid having to correct the whole film scene-by-scene but still solve problems a best fit setting might cause. Just a thought!