Jason, what a bang up job you've done. This is great stuff!
I'd love to know how it works with gelatin. I could send you some of the photoformulary melinex, which on one side is basically raw polyester and the other side a subbing that should wash off. Maybe Greg would send you some of his Grafix Dura-lar, mentioned earlier??
Any idea if this treatment has a 'shelf-life'?