Seewolf, interesting pictures.
You can see in the closeup of the deck the sort of thing I'm talking about, although it's not possible to tell (at least on my computer) whether they're screwheads or wooden plugs covering the screwheads. I'd still go with the wooden plugs, as it's a standard way of covering screwheads, and if the plugs themselves were slightly countersunk, it would explain why they're so dark, since the black preservative wouldn't get worn away by foot traffic like it would on the bare planks.
Also of interest is the edge plank along the outside of the deck, but it doesn't seem like they joggled the deck planks into it, while the Revell kit does show joggling into the sides of the casing.
Note also that there seems to be some sort of edge protection along the deck plank on the inside of the schnorkel opening. My monitor is too dark for me to tell what that is.
And yes, the water deflector in fron of the schnorkel opening is interesting too. I've seenpictures of a similar deflector on the deck in front of the 88mm in some early war pictures of type VII's, but never on a late war boat. You can see where the deflector goes goes when you look at the framing underneath the deck.
Looks like the inflatables were probably yellow to make them easy for rescuers to spot. I guess not planned for clandestine landings at night, or perhaps they had one black inflatable or a covering to hide them at night when needed.