PSDTUTS: How to Create a Rusty Texture in Photoshop
"In this tutorial, we'll learn how simple it is to texturize objects using different fusion mode layers, adjustment layers, color tweaks and some very simple filters in Photoshop. You can use this simple technique in more complex illustrations of your own creation. Let's get started with learning these techniques!" Sergio Ordonez
Created by Gavin Steele.