I hope this is the right category, and not too obvious... For the longest time I have been intrigued by the headshots of major film stars from the 30's and 40's regarding how they were manipulated. Though I have shot film, I never did any manipulations of the negative. Also, a recent Google, didn't give me any info either. Now that digital makes it so easy, the question haunts me. So, what did they do back then to correct skin defects?