Bummer to do all that work for nothing… Have you thought of painting the boiler black? I have a NOS 504 that’s all black and looks very nice. I’ll see if I can find a picture…
When you've been officially retired as long as I have, sixteen years, you tend to look for things to do as long as it isn't hard labor - besides this was an experiment that I wanted to do regardless of the outcome. The only black boilers that I really like are my Cheddar ones, otherwise shiny copper but that's just my personal preference.