All of this warriors are painted in the most easy way I could find, first a metal drybrush, then clothing with kantor blue (gw), refractory green (va) and German camo (va), for the skin, red beige (va) and light flesh (va)followed of washes of ogryn flesh and nuln oil. Then some lights for the blue with enchanted blue (gw) and with the base colours for the rest.
The shields have a little bit more of love, I picked some examples around the web and painted them with black and white. The berserks are really bloody using games workshop blood effect, awesome paint, I used to make my own mix with black, red and gloss varnish, but with this paint its the same effect and easier to do.