Updated with example!sta.sh/0z0nxxx296y
I did this technique two or so times on this image, with moderately small blur settings. Gradually repeating this will give you better results than over-blurring. Over-blurring completely rid me of the color in my lips on the example image, for instance. Nobody wants that...
The biggest difference can be seen on the tank top, since it's so dark.
So, I learned something so useful from Phlearn LLC, (you should search for their channel on YouTube if you have time)
It wasn't in a tutorial dealing with noise, but it's what I use this trick for. If you've seen a tut with this before, show me? :3
BEFORE using any noise removal filters you may have, duplicate your image and zoom in on the duplicate at 150 - 200%, to any area which shows the noise the clearest. Go to Filter > Blur > and pick from either Box Blur or Gaussian Blur. I prefer Box, but Gaussian is sometimes better, so it just depends on your image. Blur it to any amount which blurs out the -color- of the noise. Don't go too crazy but don't let any noise color show - each image will demand different settings, so experiment. Next, let the blur process and then set the blurred image to the Color blending mode.
Thanks Aaron (Nace) ^__^
This also works for just random color bleeding and colors that shouldn't be there in the first place. Sometimes the stock we're stuck making and using are less than professional quality, so I really hope this helps you as much as it helped me.
Shoot, sometimes I don't even need to remove the noise itself when I do this. It's just the colors that make some noise obvious and eyesoreish. Try it!
So.... ciao until next time ;D