Hi, and thank you for your further help.
The original concept (from the lady's radiologist, who is in Italy, which introduces a further 'remoteness' problem) was that 3D printing would be a readily available way to produce a relatively complex geometry 'glove' (actually 'shell' might be a better word) which would provide separation, support and protection for the hand/fingers without being too bulky. I can still see the logic in that. A multi-layered silicone item would have the hygienic and fabrication advantages that you describe, but I imagine that it would be significantly more cumbersome than the 1mm thick hard plastic shell that I was imagining. To provide context, the lady's fingers are only a few centimetres long, similar to a young child, although she is an adult.
(Incidentally, I am a huge fan of your salt water adhesion procedure. It has never let me down.)