Just returned from a trip to the beautiful Upper Peninsula of Michigan. The weather was gorgeous for most of the week, however on the day that we went on a cruise around Picture Rocks, the day was overcast and the sky was milky-gray.
So, all of the photos taken on that day were low contrast (in part due to using legacy manual focus lenses), and skies looked "blown" (in reality, that's pretty much how they looked in real life). Here's a typical original shot. Not the best one, just the one I got to first.
I attempted to salvage the sky by using higlight brush set to about -40, lowering global luminocity of blue channel to -7, and increasing blue saturation to +56. Still, the sky looks dark and gray-ish.
An easy way out would be to copy "good" sky from a different photo, but this requires editing every shot in Gimp.
What else could I do to get a more natural looking sky ? I am OK with the way water and rocks came out - this is very close to real life.