I just wanted some help on how to deal with the issue of skin discoloration. It seems that I always end up with very subtle patches of discoloration in my retouches that frequency separation and dodging and burning won't fix. Now i have heard of people using colorized hue and saturation layers to acheive a more consistent skin tone but I don't really understand how that works to be honest (maybe I am choosing the wrong hue or masking it in improperly). I also remembered a while back someone using the color picker to determine multiple spots and then somehow evening them out.
Here are two examples:
A wedding photo that I did recently (Note her forehead): https://dl.dropbox.com/u/20483124/AT1F1530.jpg
A fashion photo I did (look for the face): https://dl.dropbox.com/u/20483124/_MGL3141.jpg