Extracting Photograph Noise as a black and white layer from Photograph

Question

I am looking to extract natural noise from a photographs material and create a black and white layer out of it, but I am new to photoshop and unsure how to proceed with this.
For example, here is a photograph of a hard plastic gun.
[IMG]http://dl.dropbox.com/u/2871613/racer/G36.jpg[/IMG]
I have seen on forums where users will find a good reference image and use it to create a new black and white noise picture utilizing the reference.
For instance the hard plastic noise from the gun, might look like this once extracted and done correctly.
[IMG]http://img.photobucket.com/albums/v11/wwarriorww/hard_plastic.png[/IMG]
Any ideas on how to produce something such as this?
Thank you

Answer 1

This is just off the top of my head...  You could try something like this:
1.  Duplicate the image as a second layer.
2.  Run a noise-reduction tool with aggressive settings, possibly multiple times.
3.  Set the noise-reduced layer to Difference.
4.  Merge layers.
5.  Filter - Other - High Pass.
6.  Enhance the magnitude of the result with a curves or levels operation.
-Noel