Step 1
Ok, first of make an new image, 400x75, & fill with black, reset your colors, select the gradient tool & set it to difference then set it to diamond gradient.
Go wild making small & large diamonds until you get something like this, don't worry if its not, yours should be a little different.
Step 2
Next use the Glass filter with following settings
Distortion: 5
Smoothness: 3
Texture: Frosted
Scaling: 100
Invert Box: Unchecked
Step 3
Now use the Ink Outlines filter with next settings
Stoke Length: 4
Dark Intensity: 20
Light Intensity: 10
You should have something similar to mine.
Step 4
Now bring up the Hue/Saturation Box (Colorize Box: Checked ) and set the colors you want, and remember to have the colorize box checked.
Final Product
Now you have a rust metal background! Below is the final product.
