i had a shot that was fine in colour and lighting but was devalued by over exposed white boards in the back of the shot. i tried adjusting the brightness of the clip and colour correcting the clip both of which effected the subjects in the foreground to much making the clip look dull and lifeless.
i then decided that i would overlay the video with itself on the adobe timeline twice, i then cropped out everything except the board to the left applied the tool RGB Curves and adjusted the brightness and colours untill the board was no longer over exposed. i then repeated this technique for the second board.
Below you can see the before and after images. This technique worked for me as the moving foreground images did not at any point in the video cross the overexposed background image if they had i would have not been able to use this technique.