Before I sold my previous house in 2006, I spent a lot of time and effort cleaning my garage floor to remove motor oil and other automotive fluids. I could have saved myself a lot of that time and effort, as well as the money I spent on cleaning supplies, if I had taken the time to apply a garage floor coating when I first bought the place.

Besides the epoxy, I'm not sure what color I would have chosen for the finish. The color of the cement naturally looks like a light gray, so I would assume some shade of gray would be okay. I've seen it done with a white finish in aircraft hangars, but it looks too dirty too quickly. Checking out the pictures at Car Guy Garage, I see they have a "slate" color and that's probably what I would have gone with.

Don't do like I did and wait until you're getting ready to sell to do something about your garage floor. Invest a little and save a lot of headaches by applying a coating to it.