line-x does it. called Aspart-x its a resin and iso 50 mix with chips as a texture coating. you can chose your colors whatever you want. small chips big chips ect. durable as can be. a little pricey. worth it though. Probaly be in the 2-3k range can do designs and shit in it as well. nothing stains it. fuild just whips off it. and hot tires after a long drive you can pull right on it. no worrying about the heat of tires hurting it.
http://www.linex.com/pages/2010/residential/gallery.php