Apache painting advice.

Hi guys - I'd appreciate your input on this,

I'm currently working on the Italerai 1/48 Apache Longbow and I'm approaching the painting stage. Now I'm a little undecided about how best to go about painting this beasty.

Im looking to paint this chopper in a fairly dark scheme, and I'm going with a Humbrol enamel dark green base, however what I want to do is create some nice subtle differences in textures and possible lighter shades on raised areas.

Here is my plan,

1 - dark green base - uniform coat.
2.- mix a slightly lighter shade and airbrush raised areas and corners
3 - black wash using artists oil paint
4 - very subtle drybrushed highlights of raised detail ie - rivets and sharp corners

Good plan? What would you do differently ?

Thanks

John