[Dave Williams] “Has anyone been able to do a key on a totally washed out sky, add some color and have it look realistic?”
Yes, these days its an expectation.
The technique is usually a combination of Luminance-qualified secondary, erode/blur plus a power window to put some shape into the sky gradation. This gets a little tricky for material that is less than 10-bit, as banding will set in fairly quickly. You should save this operation as a node tree that you can append to a current grade, but also be prepared to do some tracking. Try not to do custom shapes, but mostly rely on the luminance qualification to provide a basic “shape” that you can feather, then shape with a boolean window operation.
Look at a natural sky and for the most part, you will see that horizon lines are less saturated than higher azimuths.
Otherwise 24 working hours for a 1200 event timeline doesn’t sound that unreasonable for a seasoned colorist. That’s what we used to get allotted for feature length intermediate transfers, including notching, film transport, viewing and loading/unloading reels.
jPo
“I always pass on free advice — its never of any use to me” Oscar Wilde.