In one of your answers below you said that you "check the layers and erase back anything that is blown according to a threshold mask." Could you explain how you check if something is blown? THank you so much!
First, you have to find out what your lab's threshold is. Meaning above what point will the colors simply posterize and you will lose detail. For most labs that is above 230-240 even though the "technical" cutoff before colors are blown is around 250-255. You can use the eyedropper tool and simply scan over your photo with the Info palette open and see if you are going above 230-240. Or you can create a threshold layer mask above whatever layers you have made and set it to 230-240 and see what shows up as blown. It will show you anything directly below it that goes over whatever number you set it at. Then erase back those areas or burn them, etc.
