The fingerprints are just cleaned and maintained based on the source, no projection or other fakes. Only existing detail enhanced and cleanrd.
Yeah, you need many workarounds dealing with skin to capture the detail. For the hand we used around 1500 photos (42mp Sony A7RII) Especially on the macrolevel, you loose too much visible detail due to the translucency and oily specularity of human skin. It can be done though.
These are raw scans, directly from RC.
(right click -> view image for full resolution)