Figure 1
Sometimes our images need some spicy backgrounds, and here I'll show you how to make a really rusty texture.
Figure 1 shows you the result of this tuturial...


   


Figure 2
I started with a new image, 200 x 200 pixels, transparent background.
Choose a light beige color as foreground color (#9E8B75), and fill your first layer with this color (fig. 2).


  


Figure 3
Now we'll have to add some noise to this layer:
 
Filter - Noise - Add Noise - Amount 40 - Gaussian + Monochromatic.


  


Figure 4
Your image should now look like fig. 4.

 


Figure 5

 

Still at the first layer run Filter - Blur - Motion Blur:
Angle: 45
Distance 999 pixels

Your image should now look like fig. 5.

 


Figure 6

 

Now we are going to add some Ocean Ripple:

Filter - Disort - Ocean Ripple:
Ripple size: 9
Ripple Magnitude: 9

You image should now look like fig. 6.


Figure 7
Make a new layer.
Select a darker brown color as your foreground color (#866636).
Activate the Paintbrush Tool and select a soft brush (35).

Paint a few strokes so your image looks like my fig. 7.
Now go to Filter - Blur - Gaussian Blur - Radius: 7 pixels.
And then: Filter - Blur - Motion Blur:
Angle: 45
Distance 40 pixels.

 


Figure 8
On the same layer change the layer mode from Normal to Color Burn.

Your image should now look like fig. 8.

 


Figure 9
Create a new layer.
Make #866636 your foreground color and black your background color.

Filter - Render - Clouds.

Change the layer mode from Normal to Color Burn, and turn down the layer opacity to about 60% (if you want the rust effect to be a little lighter enter a smaller value...)

 


Figure 10
Create a new layer, and fill the layer with the brown color.

Filter - Noise - Add Noise:
Amount: 35
Gaussian + Monochromatic

Change the layer mode from Normal to Soft Light.

 


Final result !
Finished!

Play around with the settings and you'll see there are no limits to the different effects you can make out of this tutorial.

Have fun :o)