Stencilled, as far as I remember, but couldn't swear to all examples being done that way.
The grey on the bubbles initially was the older wagon grey, like you'd get on older brake vans, cattle trucks and wooden open wagons. The "H" vans, Palvans and steel-panelled brake vans were somewhat lighter.
If that shunter was still at Inchicore, would they have to re-name it "Ethnic Minority" or "Locomotive of Colour"?