Using a suggestion in an earlier thread I made a small fence on my guillotine paper cutter using strips of blue painter's tape. Two or three layers give you enough of an edge to line of the sheet. Hold the film down when you cut so it doesn't slip. I've had no problems with finger prints if I wash my hands first. The ridge of the tape is so slight you can use a paper cutter normal duties without taking it off. And I just take a little clip off the corner with a paper punch.
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