Using the Red Channel

This is the original.

This is the original in greyscale.

This is the Red channel only.

This is the difference between the greyscale and the red channel.

This is with 15% of the difference layered on top of the red channel, reducing the noise a bit, but keeping the majority of the image as red only.

Finally, since the graininess makes the image look kinda old-school, I thought I'd add in a bit of vignetting to cap it off.