looks like a rice krispy treat! it looks like one of my quartz floors without top coats. Like I said, I've seen these on pool decks. I can't imagine this in a garage. Where as soon as you open your garage door, evry neighborhood leaf and debris get sucked in. Those nooks and crannies will eventually trap dirt and oil. If your floor looks like this 930, ask if they can at least add a sealer coat to fill in those spaces. That would be my pro opinion. If I where to offer that, in a garage, I would seal and poly it or use a poly eurea or spartic.