I epoxied my three car garage floor right after I bought the house. The garage floor was 11 years old at the time. Cleaned the floor very well per the instructions. Used the Rustoleum brand kit found at Lowes. One kit will do a single car garage and costs ~$65. I did it myself and it took about 1 1/2 days - 1 day to clean the floor and 1/2 day to apply the epoxy to all three bays. I brew in the garage and clean up of spilled wort is a breeze. Much better than bare concrete.