Thanks for all the input. When I said that I had tried garage floor paints, they were not on this particular floor. I tried them on my previous floor and they all came up, no matter how closely I followed the recommended application, use of primer, etc. etc. This floor has not been painted. I have some of the interlocking rubber matting in my barn (weighs about 75 lbs each piece), but I have been hesitant to transport it to the house.
The garage is to be used for parking only, no jackstands, no work area etc.
I just thought that maybe an easy solution would be to put down some black linoleum tile squares as they can really have a showroom quality if kept clean.
But I'll consider all the downsides and make a decision.