Welllllll, I don't think this is what dpurdy intended, but his post got me thinking.......... 90% of my problem is with the back of the photo paper not taking wax well enough to collage/glue to other wax layers. I wonder if I first heatpress mounted or glued the photograph to a plain absorbent piece of paper and then collaged that? Something like BFK, medium weight and really absorbant. I suspect the plain paper backing would solve my problem by absorbing wax and melding better than the coated/clay photo paper.
Something to experiment with! I'd still love to hear other opinions and experiences.