To be honest, since there were so many zombies to paint and they go down like fodder, I used the dip method with Minwax Polyshades.
After blocking out the colors, I painted purples and pinks around the open wounds and liberally slathered on the reds for blood. Painted on the dip with a brush, waited a couple of days to dry, Dull Coat, finish up the bases and off they shambled to be cut down like corn.