Hartman,
Very nice, realistic looking buildings. Thank you for the PRR poster on the inside, by the way (although it is not a switcher)! For the outside of the gas station, side walls and along the front, you could spice up your modeling by Googling some vintage signs like Ford, Studebaker, Champion Spark Plugs, etc. and shrink them to size, but dirty them up a little. You don't want it to look too clean at a greasy garage.
Tom
