I believe that many of these images may have come from you or from links you provided, so these may well be redundant... but just in case...
These images all suggest to me that only the panel lines on the upper cowling were readily visible from a distance which leads me to believe that the 152s that saw combat action had the extra time spent on them in the factory applying filler to the the panel lines and quite possibly the rivets also (as they're only starkly visible in places where the paint has chipped off). Thus, the only clearly visible lines should really be the cowl, the MG 151/20 folding hatch:
and all the other regular access hatches for fuel, radio, electricity etc.
JC's book does not provided anything the way of photos of the 152 that I've found yet, it's all Dora stuff. There's a profile for the orange 152 and the one I'm doing, with a photo that is floating around here on the forum. The 152 camo was essentially exactly the same as late Doras so I will flip through it and get what I can from it.
I'll get back to you with the rest of the stuff you asked for later on.
Cheers, mate.
[Edit] If it helps, I beleive that the palest shade of 76 available on Simmer's Paintshop is the best representation of the shade of 76 used on the Jg 301 152s, including 'Yellow 1' that I'm doing, that I've come across so far. I will try and get some more photos of late D9s out of JCs to help you out, though.