Wiring diagram and copper foil question - Lemmy.ca

I have had a 1960-era Marlin (not Martin!) guitar since I was a teen in the '80s. I abused it, trashed the finish, changed the electronics, and then took it apart for a project that never happened. I’d like to restore it roughly to its original state. Right now, it’s all about the electronics. First off, is there any advantage to lining the body (pickup) cavity with copper foil? Will it reduce the noise and hum? Secondly, since I have to desolder the switches, will twisting the pickup leads help? Thirdly, does anyone have a wiring diagram for this thing? Two single coil pickups each run to an on/off toggle, but then I’ve got a handful of broken and loose parts. The URL is for an auction of a guitar (almost) identical to mine, just to trigger anyone’s memories. Thanks all!