Bluegillerkiller a friend of mine built two skating rinks in my home town, one is now a Moose club and the other is still a skating rink, but he epoxied both floors and you know how much abuse they take. He's passed away or I would ask what the procedure is. What seems to stick in my mind is the one of the slabs may have been like a road tar rather then cement. He did the epoxying himself. At any rate you might check with skating rink associations.
