Would you see that if it was up on a stone foundation?
I usually do put a drybrushed ring of dirt colored paint around the base of buildings, but here I though the splash would be on the stones.
It's art. I really don't think there's a "right" or "wrong" here, but prototypically, the lower dark area wouldn't always be there depending on the climate of the area. If you're happy with not doing it, or if you decide to do it, either one doesn't detract.
I don't have any photos to support my contention, so whether my suggestion was "nullified" is arguable, but a high foundation would definitely minimize it.
I believe you'd also see some vertical streaking on the exterior walls where the roof runoff might go. Some streaking on the roof would also be relevant, particularly associated with vents, chimneys and smokejacks...which I don't see on the roof of this model. Some kind of weathering would also be appropriate on the main roof, directly under the upper roof on the skylight casing.
You might want to also do some bird excrement on the very top, and get some N-scale pigeons to perch up there.
Might be a good idea to also make some gutters, which are always interesting structure details with the brackets and downspouts, and were usually present on most buildings.
I'd also put a darker wash on the foundation to settle in the mortar lines to pop the bricks a bit.
However, I'm just gnit-picking. I think it's a really nice lookin' N-scale structure.
Maybe some cracked or patched glazing in the windows, ...or a vent of some sort coming out, and some electrical boxes...and a lamp over the door too...and a rickety wooden bannister on the steps...and a doorknob with a plate and keyhole on the door.
I also think the caskets shouldn't be weathered. They should be brand-spanking new...unless they've been recently dug up. I'd also put at least one leaning vertically against the exterior wall...to save space on the loading ramp.
I can go on and on....
The old, peeling paint looks very good.
