Hmm, I an having quite a bit of trouble with the black and white Polaroids. The paper separates but the emulsion isn't going anywhere. I will try boiling water but what I have been using is darn close to boiling!
I am really eager to get this to work. It is my first day, and my very first (690) was a success despite a few tears. I applied it to canvas so I was able to submerge in water. The second two bubbled way too much and I was not able to separate them from the layer of clear emulsion stuff.