Joe, That's a great finish! you can't beat nitro for that 'classic 'look. Being an old guy, I 'grew up' using nitro lacquer on my instruments.
My favorite finish, from an aesthetic AND sonic sense is still a rubbed-in finish. I absolutely love the tactile sensation of a well used tool in your hands, and strive to get that patina in my finishes. For that, I use a tung/poly mix. after sanding to 320, I wet-sand in the mostly tung oil first wet coat. The slurry produced helps to fill in pores especially in walnut and mahogany.. I let it soak quite a while ( but not until it's tacky) and wipe off the excess . then steel wool (i prefer 000 to 0000 ) inbetween coats. re-apply with more and more poly added to the mix.
This finish can be as little as 3 coats or as many as a dozen, depending on the amount of shine you want. each successive coat has a bit more poly and a bit less tung.
finally, after a week or so of hardening, I buff with 000 and wax (body only) .......
my personal bass, which I built in the early 90's has literally hundreds of gigs and the finish is holding up great! easily repairable too.
It's all about the prep.
I;ve been experimenting with automotive urethanes as well. and generally like them , but don't have a decent spray booth, so that limits my experimentation. but here's one I did with automotive urethane
Karl Hoyt