In my previous house we got rid of the epoxy stone finish, and replaced it with a product called SunDeck. It will add color and texture on top of existing concrete. If you have a lot of cracking in your exisitng concrete they will add score lines to it, because eventually it will have surface cracks like concrete. The great thing about the product is water doesn't penetrate it, and it stays cool in the hottest of days. It is the cousin of Kooldeck which is applied to fresh concrete. It is fairly expensive if I remember correcly. If you search on Google, you can probably find their website for more info.