Perhaps consider a phosphoric acid based rust converter before the paint, but check compatibility.
@ai6yr Plus those old tools were built like a tank and made to last.
Highly recommend a more modern tire that does not need to be inflated
@EugestShirley LOL
Also, fashion in the 70's was... interesting.
Flower power!

The whole flower power / summer of love thing was in large part a cultural reaction to the Vietnam war, and Korea and WWII before it.
I wish I was seeing something analogous now.
Hell of a project, congratulations on it!