Looks better than an 1882!
Coat thickness, prep-work, temperature, and humidity are the keys to nice paint. Try for two thin coats vs one heavy. Too thick is the number one mistake. A thin "tack coat", or "misting" let to dry a minute or 5 can aid against runs if you can't go to two coats easily.
I never could find reference to an exploded view, instructions, or figure out myself exactly how the stack assembly comes off those Generals. Any ideas?
I managed the rest of the "puzzle" fine (the PW versions aren't real easy). I just couldn't manage to get the stack off and apart. I need to redo a weak smoke resistor.
A note: I don't know how prototypical you intend to be, but while I was entertaining that thought, I learned at least one, maybe both (I think the Texas) had a straight stack originally. I think the funnel was added in a rebuild during the early 1900's.