Knife???? Really! I hadn't heard of that kind of retouching. Wow that is a risk! Well, I would certainly make a dupe neg before attempting that Imagine you get a few minutes with some famous film starlet and then you take a knife to the neg...
Yeah I think I'd shoot at least 4 sheets.
Now imagine trying to retouch this way with 35mm film.
Mark Barendt, Beaverton, OR
"We do not see things the way they are. We see things the way we are." Ana´s Nin