Nice looking scene, Drew!
Who is BTS? I put together an N-scale Walthers kit a couple of months ago (University Avenue Shops), and was surprised to see how poorly the pieces were molded. They appeared to have filled in the molds from the "front" side of the pieces, leaving those little circles in plain view. With some very tedious cutting and sanding, I was able to remove some of them. Also, there were a number of "errors" in the brickwork...like little bits of plastic that fell inbetween the bricks. I never figured out an effective means of removing those... From a distance the structures look fine, but you can still see some of the blemishes on close examination.
Your little people bring the scene alive. I need some people (and cows) for my layout!
-Rory