Thanks guys, it was a lot of fun! thanks for the comments,and Cheers nimrod, the stand was purchased from
http://www.flightpose.com/
And here's a breakdown of the weathering,
stains: mig wash (or make your own enamel based wash)
shades/smoke from engines etc/burns/subtle streaks: pastel (sanded to a powder then applied gently with a number 2/3 brush blow excess dust away and repeat)
Oil streaks or thick streaks: tamiya weathering pack, wet a 0/00 brush and gently by hand paint a thin line
Spattering: Thick stiff brush dipped in neautral or grey wash and then flicked over the area or brushed out of the top of the bottle so it 'spits' over the model.
Deep shadows: Airbrushed tamiya xf 53 neautral grey thinned more than normal (around top turret/side walls/ engine grill etc
Hope this helps good luck and enjoy it!