Concept: We are changing pale and dark looking metal piece to the bright shining gadget as if its polished using Adobe Photoshop. Actually we are brightening it and adding more contrast. Beside we are applying sharpen filters to make it more prominent. You need to know hue saturation to apply proper degree of realistic color, shade and tone to the image. Try to experiment with different layer blending modes with this lesson.
1. Open Photoshop. Open the image to
apply metal polish.
2. Make a duplicate of the background layer and keep
the duplicate layer selected. Change the top layer mode to "Screen"
3. Image > Adjustments
> Hue/Saturation (Hue: 0 Saturation: +70 Lightness: +10)
4. Image > Adjustments
> Brightness/Contrast (Brightness: +20 Contrast: +20)
5. Filter >
Sharpen > Sharpen