His interview with the old railworker and grease-pen graffiti artist Colossus of Roads was fascinating. Unfortunately I cant find it on youtube anymore with a quick search, otherwise I'd put the link here.

Railroad guy was Russell Butler. He was relatively prolific and had an insta account.

https://www.instagram.com/buzblurr/

Is this it? https://youtu.be/-Eo4WuhpiJg?t=1085