Phil - a tip. If you airbrush try out the Vallejo acrylics. They are in an easy to use eye-dropper bottle and come in two types, one made specially for the airbrush that can be used without thinning and one for the hairy stick but, well thinned, can be airbrushed with a great range of colours. For armour they have their Panzer Aces range specially produced. I find the Tammy acrylics a bit pricier in small 10ml tubs (Vallejo are 17ml), they do not brush well and are less convenient for loading into an airbrush. They do a good range of washes and pigments too though the AK Interactive range may have the edge there. Try this link
http://www.scalemodelshop.co.uk/ for supplies with a good service.