Massive Voodoo has created a nice chart comparing the colors of various metallic paints.
Painting
Painting 15mm Zombies
Given the fact that you need so many of them 15mm is the perfect scale for Zombie games. Here’s a tutorial on painting them.
Weathering Metal Armor Tutorial
Kevin’s Miniatures and Hobby Table has a post on techniques for weathering metal armor. I’m going to use some of these techniques on my Lord of the Rings Orcs.
Camouflage Painting Technique
Santa Cruz Wargamer has a tutorial on painting camouflage on a Tau vehicle.