As soon as we get time we are going to re-do our workshop/showroom area of the garage and do it with the vintage industrial look. On the longest wall, the plan is to do brick veneer (thin brick) to give it the warehouse/industrial look. On the other walls we are probably looking at cedar or maybe even some old reclaimed barn planking if I can find it.
Since my cement floor is not level, we are also going to build a platform over the concrete and put down tounge and groove pine to give it that "old factory floor" look.
I did a google search on vintage workshops and other type of phrase I could think of, and then looked at the images link. You can get a ton of great ideas doing that.