I would like to know some information about spoting black spots on a lighter background like a sky.
In this case my black spot is on the negative itself. I use spotpens..but using lighter tones to mix with the sky, doesn´t seem to afect the black spot!
I use a sharp knife to scrape off the dark spots. Alternatively, you could retouch the negative - find the hole in the emulsion on the negative and put a black dot with the spotting pen.