As promised:
These photos show the limits between the 'naked' wood and the vintage tint nitro finish. I followed Blair's guide but also oiled the neck with True Oil gustock oil as per Roger's recommendation; it feels almost like bare wood, but a little harder, less porous. I never felt the nitro finish to be sticky at all until recently and then I decided to go for the same finish/feel I have on my double bass. I can't be happier.

Congrats Fran! You did a great job. I like the way you did the side of the headstock with the hard line transition.NICE!
I hope you paid particular attention to "whiskering" the surface well with the 400 grit. That's where the silky feel comes from. Not sure I understand what you mean by "less porous" (with the oil application). Mine feels like glass & has the illusion of feeling harder than it did with the finish on it.
I'm really pleased that you had the courage to go through with this. You're gonna love it amigo! Nice thing is: now that the nitro is gone, you can always re-do any of it quite simply if needed. Did you have any problem with the nitro dust? Maybe it was less of an issue due to its aged curing. Mine was freshly sprayed.
B.