Originally posted by ll_coffee_lP - Submit again as a b/w image with selective dodge/burn in the engine area (like Tim has shown).
Just my (c) (c)'s.
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Actually, instead of dodge and burn, here is the technique I used. All processing done with PSP.
Here is the original I used to show this technique in another forum.
1) First,I made a duplicate layer and desaturated it using Hue/Saturation/Lightness
2) Then I changed the B&W duplicate layer to a negative.
3) Then change the blend mode of the duplicate layer to Overlay and change the Opacity to approximately 50-55%. Different photos will require a different Opacity setting but generally it will fall between 40-75%. I used 100% Opacity on the OP's image for this thread.
Now merge the duplicate layer into the background layer. The image should look kind of washed out. Don't worry, now I'll show you a technique to bring a little pop back to the image.
4) To give the image some pop, I use a double USM process shared by benjikan.
Benjamin Kanarek post processing method | PentaxLife
Here are the settings I used. The first USM action was Radius @ 0.3, Strength @ 250, and Clipping @ 0. The second USM action was Radius @ 50, Strength @ 12, and Clipping @ 0. After you run both USM actions, duplicate the layer and set the blend mode to Soft Light and adjust the opacity to what looks good to you (I used 100% opacity on this image and on the OP's image).
This duplicate USM layer can also be desaturate and the opacity decreased if contrast and saturation are too strong.
5) Once you flatten all the layers, you can now tweak the image using layer or curves if you desire. I used a slight curve adjustment on the OP's image.
6) Convert the image to black and white. I used Channel Mixer with a setting of Red 30 - Green 59 - Blue 11.
Feel free to PM me if you have any questions.
Tim