Ok, next things next. This is what's on today's menu: the JM along with a 1959/60 Supro Dual Tone and a vintage style Strat neck that I picked up along the way. I plan on doing the Supro and Strat neck first in order to fail better on the JM.
Taping off the cavities and what's left of the original sunburst + ES stamp.
Super-longscale conversion necks(TM) in place:
Decided to leave as much of the heel only very lightly sanded, because you could still see the original stamps and markings, didn't want to risk losing any of the original factory traces. The slightly tinted lacquer should in theory blend nicely.
After spraying the primer:
JM fully primed and ready for some Inca Silver action
First coat of Arctic White on the Supro and first mishap:

Looks like the primer doesn't react well to the wood filler I used. After drying I wetsanded these fish eyes with 600 grit and luckily all has been fine for subsequent coats. I'm happy none of this is happening on the JM.
First coat of silver. I'm liking where this is going!
After 4-5 coats of paint:
Here are the necks after about five coats, I really like the tint and it perfectly matches the old lacquer on the heel.
Also, I didn't sand the original yellowed lacquer over the binding - I love how nitro seamlessly melts into existing finish after around 60 years.
The finish came out pretty smooth and I hope I'll have no trouble sanding it back to a nice shiny finish when it's fully cured.
Today, I'll finish with some more color coats on the bodies. If the weather allows it I'll be done with the clear coating in about 2-3 days and then it's at least 4 weeks drying time.
That's plenty of time to do the refret and also fiddle with some cool new neck resetting technique for my Höfner Verithin (featuring electricy and DIY heater elements

).
I'll keep you posted!