Which general colours to keep in stock for tank detailing and weathering?

[fidgeh]

I have a growing interest in the tanks of the German Army during WW2, and have acquired a couple of kits to make. I am interested in perhaps making dioramas featuring these kits, although this is a long way off at the moment.

I realise that this is probably a 'how long is a piece of string' question but, aside from the specific colours for the kit to be built, is there an 'essential' stock of colours which afv modellers keep for detailing and weathering etc. for a model depicting a vehicle involved in the fighting in Europe?

I would like to use acrylics where possible. Any replies to this would be much appreciated.

Phil