I'm still in the early construction phases at this point. Yes I've had some storms of dusty rain. My wife wants me to leave the ceiling open, or at least that's what she's said in the past. Going forward its an open question. I have considered at least painting the ceiling either a dark blue or black, in the past.
Catenary is in the plan, although I don't know if it will be working or not. The Reading unit is an unmodified Tyco GG-1 from the '80's(I think on their C630 type frame arrangement). The PRR unit will eventually get some sort of Reading paint, either similar to the other unit(like the F units of the RDG), or something similar to one of their road switchers from the 50-60's, prior to the yellow and green scheme, or a third possible scheme similar to #118 that pulled the Crusader, with a silver and blue motif. The PRR unit has an Athearn BB Trainmaster chassis under it, which will need some sort of decoder, as the plan is to go to DCC.