After mudding, sanding, and sealing the drywall, it was time to texture and paint it. For the back wall of the garage, I used a spray texture in addition to the usual spackling, which makes it a little more resilient to dust and other garage dirt. I used Homax pro grade orange peel wall texture.
Once the walls were textured, I installed some vertical trim to frame the walls, which would eventually be painted over.
Finally, I painted all of the walls. For the garage back wall and the utility room, I kept the same taupe brown color, and for the bathroom I went with a light grey.