Firstly, I didn't know that you could buy unperforated film, but there you go. Most C41 machines that I'm aware of don't require perforations for the processing cycle. The film is attached by tape to a plastic leader card and is dragged through by that card, which has perforations down the centre to engage the film processor drive. Same for dip and dunk processors (does anyone use those anymore?) which only attach at the ends. Can't see any problem with scanning either.