Here is my guide for painting Gauls, Gallic & Celtic Warbands during Caesar's Gallic War uniforms using Vallejo acrylic colors. I have also done a painting guide for Caesarian Roman Legions and Germanic Warbands.
Gallic & Celtic Warband
Vallejo 998 Bronze, Helmet
Vallejo 997 Silver, Helmet
Vallejo 997 Silver, Chainmail, Sword and Spear
Vallejo 871 Leather Brown, Leather Belt
Vallejo 821 German Cam. Beige WWII, Javelin Shaft
Vallejo 846 Mahogany Brown, Spear Shaft
Vallejo 927 Dark Flesh, Skin
Painting irregular armies such as the Gallic & Celtic Warband, in an assortment of clothing colours looks best. To do this job quickly I sort out the figures into groups prior to painting. And then paint the groups in order see below.
Group 1 gets Vallejo 894 Russian Green, Tops
Group 2 gets Vallejo 957 Flat Red, Tops
Group 3 gets Vallejo 925 Blue, Tops
Group 4 gets Vallejo 844 Deep Sky Blue, Tops
Group 5 gets Vallejo 921 English Uniform, Tops
Next, choose another 5 colours and do exactly the for trousers or just mix the order up.
Group 1 gets Vallejo 921 English Uniform, Trousers
Group 2 gets Vallejo 844 Deep Sky Blue, Trousers
Group 3 gets Vallejo 925 Blue, Trousers
Group 4 gets Vallejo 957 Flat Red, Trousers
Group 5 gets Vallejo 894 Russian Green, Trousers
Gallic & Celtic Fanatic Warband (Gaesati)
My Caesars Gallic War Book Library