There are several brands manufactured by various companies designed for use on plastic model subjects, here I have started with the most common supplied brand available. Humbrol Acrylic's paints, which are in a plastic style flip top lid and all have the colour and code number on the lid, these are limited in range compared to their enamels, but these specific paints, will mix with water, but if they are applied using an airbrush, it is recommended to use their specific Acrylic Thinner or Distilled Water. Mix ratio:- 2 parts paint + 1 part thinner. The Humbrol Acrylic colour range of paints are Generic and do follow the BS or FS formulas unless specified on the paint charts, where as the Railroad colours are true and correct for any British Rail subject.
NOTE:- The containers shown here are from the Humbrol Acrylic Railroad Range.