Have you ever heard of Impossible's Fade To Black? The film is designed to do just that. I was a little worried because I was testing out a new-ish sx-70 and this is not film you want to mess with.
I'm currently scanning it for the next few hours every ten minutes to see the outcome. I'll post it with results. After playing with the first photo, it really is the collaboration of beauty and science. A big thank you to Anne from Impossible for the film!
I found a flickr group to join if you are brave enough to use this film.