Try this:
- Open the picture file
- With the eyedropper tool, sample the gray color on the sleeve. This will be the foreground color
- Open a blank layer above the background layer
- The brush tool has square brushes. Use one to draw a horizontal line for the collar
- Go to Filter>Noise>add noise, and add a little noise.
- Merge down
- Use the magic wand tool to select the white triangular background below the collar, then delete it
- Select a patch of the shirt and place on a separate layer, and drag this layer below the layer used in step #7, position the patch with the move tool, then reduce the layer opacity.
