this response might be a couple years late, but i was a negative retoucher for all the major US photographers for 12 years, did brush and dye art work removing mostly blemishes and eyebags on b/w and color negative portraits. i was the best in my field sometimes retouching up to 900 portaits per day using one of the 12 Bauche and Laumbe binnochular micromagnifiers custom made for this purpose.:)
i also want to sell my machine if anybody want it. its attached to an adams machine . i paid $1200 for this rare item in 1996. you can retouch a fly on the wall of a 35mm negative with this. its amazing!