>>4454561
Try noise reduction on it, idk what to tell you.
I based my method mostly on these curves from the Kodak datasheet and other Kodak papers, along with some other publicly available stuff. Without seeing some slides myself, I have none, unedited scans, or knowing Kodak trade secrets, there's not too much more that I could improve.
I've spent like a week on this, not all day, every day, so, let me know how much $$$$ it's worth to you.