Well, I have practiced on and off with some old HO models, not looking at any reference, they have come out pretty ugly. This is my second N scale attempt, my first with reference photos. Here are the links to the reference photos.
http://www.railpictures.net/showphotos.php I spent about an hour and a half on this project, nothing really fancy, just added some roof exhaust. I plan on start using washes soon. The materials used were a small paint brush, some dull cote, and AIM weathering powders. Enough of my rambling, time for some photos.
Not really diggin' the speckle look on the exhaust.