Great machine
This will be a fun restoration project. I recently restored a Lux just like it.
As for the PN1 power nozzle. I would suggest replacing the brush roll and belt, and yes, while you have the PN1 top cover off it wouldn't hurt to put a drop of oil on the motor armiture's drive shaft shaft. Belts and brush rolls and even a replacement elactric hose with the optional on/off switch for the power head for the PN1 can be found on eBay at very reasonable prices.
Mothers aluminum polish and 000 grit steel wool will polish the chrome up very nicely. I was also able to match the exact paint color of my Lux with auto body touch up spray paint. If I remember, it was a touch up color match for a 1966/67 Chevy.
If the main Lux motor itself seems to be working without any unusual grinding or other noise. No need to tackle taking it apart. As its not an easy job.
As for the handle replacement. Again, check out eBay first. Ya never know what someone is selling. To buy a new handle for the machine is around $40.00
Hope this info helps & Best of luck with your restoration on your Lux.
KG
