Rust Tutorial
-soxX

This is quite a powerful effect when used correctly and can be very useful to create realistic rust on metal or anything else. The final image is very basic, this is just an introduction.

This tutorial works better on some things then others. Since it relys on Color Burn, different images will change the way the final product will look. For now I recommend using a light colored background until I write the universal version of this. It is much more in depth then this one, so that might take me a while to write.

Start a new image. In my case, 500x500 pixels at 100 resolution. Create a new layer. Fill with color #CBCBCB. This will be Layer 1. Make a new layer, Layer 2 and press D to select Black and White in your color selection box. Filter>Render>Clouds Now, open your Color Range box. Select>Color Range With your cursor select black or a drak grey in either the Color Range box.

Press OK. This will select all the dark pieces of Layer 2. Inverse your selection, Select>Inverse. Press Delete or go to Edit>Cut.

Invert the image, Image>Adjust>Invert

Deselect Layer 2. Duplicate Layer 2 above your original Layer 2. Select your Layer 2 Copy and add noise, Filter>Noise>Add Noise, 30%, Gaussian, Monochromatic. Press OK. Filter>Blur>Motion Blur, Angle 0, 20 Pixels. Select Screen under the opacity options.

Chain/Link together Layer 2 and Layer 2 Copy. Merge these layers, Layer>Merge Linked. Image>Adjust>Hue and Saturation. Select the Colorize box in the Hue/Saturation menu. Set Hue to 30, Saturation to 15, Lightness 0. Press OK. Select Color Burn under the opacity options. Duplicate this layer. Enjoy