Hopefully the above question will generate some thoughts. I'm especially interested in hearing from anyone who has the JaPo Bf109K Camouflage and Markings book.
In the meantime, I decided to tackle the spinner spiral. I had scrubbed off the previous attempt and this time painted the whole spinner white. I then tried making the spiral using very thin strips of Tamiya vinyl bendy tape, first creating one side of the corkscrew, then the other, and then running another piece of tape over the gap. I ran the strips and adjusted them several times until I got something that looked like it would work, albeit rather thick:
The trickiest part was at the very tip and for this I used three punches to make concentric circular curves on a piece of tape. Here's the residue after punching:
That little piece that was lifted away formed the very tight part of the spiral at the cannon muzzle and then the rest of the bendy tape was curved to intersect it at the right angle. After spraying the spinner in RLM 70 and stripping the tape, here's what was revealed:
I just need to make a tiny adjustment at the nose where the white is just a tad too thick at the 5 oclock position in the above photo but, other than that, I'm pretty stoked at how it turned out. The picture exposure makes the green look too light but it's fine in person.
Next I finished off the scratch work in the well wells by applying strips of tape and thin styrene. I'm going to add some rivets using a needle and then paint all this in RLM 66 .
Thanks again for looking.