I agree with OddDuck. I welded aluminum truck tanks for years and I don't think that you will transfer enough heat to the table to worry about. It may get hot, near the pot area, but shouldn't get hot enough to melt or cause you that big of a problem. Aluminum is a very good conductor of heat. If it gives you trouble, like burning your hand, just line it like OddDuck said. You already have the table. You might as well use it. My two cents. :)