I am trying to find spacer material that can withstand 600°F and repeated shock. I want to use this material for spacers between long pieces of aluminum. I am trying to prevent scratches on the aluminum that occur with material handling. Some of these pieces can weigh over 200lbs with sharp edges and lengths up to 30ft. I need a material that will last, maybe some kind of hard plastic or something similar. If anybody has any suggestions, please let me know.