Paul Sorensen
Subscriber
I use a good antistat brush and make sure that I am looking at the negative under very strong directional light at an oblique angle. At that angle I can see any dust that is on the neg and get it off with the brush. I don't ever seem to need air. To me the most important thing (after trying your best to have a clean environment) is seeing the dust. If you can't see it, your efforts to remove it are likely to be ineffective. Both air and brushes have a bad habit of just moving the dust from one place on the negative to another.