Yesterday I was edited a shot of a wreck part from my last trip. After Level, Contrast and Brightness correction a few small areas of the wreck where badly overexposed.
I created a raw conversion with -1 fstop and dragged the two adjustment layer I used on the original pic on the new picture so that both images are modified in the same way. After flattening both images I dragged the less exposed version as a layer on the other version, aligned them and put a "reveal all" layer mask on the less exosed layer. Now I just painted with a small, 50-75% opacy airbrush over the ove exposed parts on the layermask and: goodby overexposure!
It's still not so good as if it would have been exposed correctly but you have to know that there was a correction to see it.
It is at least much much better than eliminate overexposed parts with healing brush or cloneing stamp like I did in the past.
I post some pictures of the steps later when I'm at home.
Simon