First of all, we need to clean the areas on the image with blemishes, flying hairs and dark spots using the healing and clone tools. Select a clean area pressing Opt/Alt, then click on a blemish. This is our first group – name it ‘Cloning and Healing’.
After cleaning all the blemishes, we will create our second group, called ‘D&B’.
Go on Layer>Adjustment Layer>Curves. Then set the line of the curve like the following image; it will makes the image look brighter. Hit Cmd/Ctrl+I to invert the colour of the mask (the bright effect will be invisible). This will be the Dodge layer.
To help us see the imperfections in each area, we will create a new group above the D&B with a Black & White adjustment layer and another Brightness/Contrast, setting the Contrast around 40.
Now using a brush with Opacity around 5% and Flow at 80% (make sure the colour of the brush is the opposite of the layer mask, black or white), we will paint in the dark areas that need to be brightened within the dodge layer, and in the bright areas that need to be darkened in the burn layer. Pressing Opt/Alt and clicking on the adjustment layer, your masks should look like the images below.