CinePost recently had a client with some film that suffered from mold/fungus. It shows up as spidery snowflakes/spots and is very distracting. The results are never guaranteed, but we’ve developed a method of soaking the film in a cleaning agent for several days, and then hand cleaning after to remove the mold/fungus. In this case we were able to remove the mold almost entirely! The untreated film is on the left with the cleaned up film on the right.