I know you can get spotting dyes for ADDING density to prints, where there are white spots. It's easy...you just draw on the print. But is there any nice, predictable way to bleach prints back? Say I have a black spot I want to get rid of. In my case, I have one of those construction lights that they place at roadsides in my picture, and it is not very readable. I want to lighten the lightbulbs that are 'on' so that the sign is more readable. It would be simple for me to darken the ones that are off, but is there a good way to bleach the ones that are on? Do people ever add catchlights to portraits using bleach?