He was sensitive about it, no doubt; but there was no one else who could or would have done it. This was before he on the train crew, and painting was his "official" job.
There is a story about the concession car: someone decided that it should be painted a different color to make it easy for the conductor to tell passengers how to find it (most likely this was Keller). However, in true Scenic Rys. shoestring fashion, he wasn't given any budget to buy new paint so he had to make-do with whatever was in the oil house and ended up mixing multiple cans to get enough to paint a whole car. It was certainly distinctive, but it became known to the employees as "Coker Ocher"; I'm pretty sure he resented getting rided about it (especially one D. Rusconi).
He put a lot of time and effort into the repainting of 483 and the sunrise herald, but the crews never liked it much. Maybe the story would have had a different result if done with white instead of aluminum lettering and red trim.