I would be afraid I would melt it. Your a brave man Bob.
Gene, I made mine out of wood and use a solid surface cutting board to place hot pans on. I have some leftover FRP panels that I might glue to the top as it's getting weathered. I know that's heat resistant cause we use it to line the back-walls on cook-lines in restaurants. You can check it out at Home depot in the paneling dept.
Tim