I've done Polaroid emulsion transfers onto glass, both matte (like
fresnel) and plain, glossy glass. It works well, the image must be
sealed with an overcoat of something like polyurethane or spray arcylic
coating so that the image doesn't expand and contract (and peel off)
differently from the glass.
There's lot of info in the archives and on the web about transfers.
later.
Darryl