I like the pics of the underside. When I painted my 08A of 69 Z, I painted the back part (mostly hidden by the gas tank) a much lighter color than everything in front of the axle. I wish I had taken pictures before the paint work started. Almost all of the restored cars I see are all the same color underneath. Maybe some were painted that way from the factory. Mine was not. It transitioned from light to much darker, to almost black. But the firewall was darker than the bottom of the car, even forward of the axle.

Mine was the same way. Underside of trunk pan was light grey. From rear seat forward it was darker with the tunnel a bit lighter but still darker than the tail pan.

Polishing polishing polishing...
FWIW I use a Cyclo Orbital polisher (Boeing has used them since the 50's for polishing aircraft such as AF1) with TWIN counter rotating Orbital heads and a Geared Orbital Makita, I don't like using rotary polishers as I feel they are way too aggressive.

https://lh3.googleusercontent.com/pw...-no?authuser=0


The geared orbital is an incredible polisher

https://lh3.googleusercontent.com/pw...-no?authuser=0


https://lh3.googleusercontent.com/pw...-no?authuser=0

https://lh3.googleusercontent.com/pw...-no?authuser=0

https://lh3.googleusercontent.com/pw...-no?authuser=0

https://lh3.googleusercontent.com/pw...-no?authuser=0

https://lh3.googleusercontent.com/pw...-no?authuser=0