Just did my garage with Wonder Paint's Like Nu cement coating and applied their urethane top coat. Very pleased with the results.
Do a search on garage floor coatings. There are a number of posts explaining the different products and their pros and cons.
I went with a cement base coating which seemed to make a lot of sense compared to epoxy coatings which seem to peel after a couple of years if not preped properly. I think a lot has to do with the present condition of your garage floor.
Check out
www.wonderpaint.com