So I've read and reread your posts, slept on the idea, and of course came up with dif idea this morning! Have a craft table from JoAnn's measuring 35x60 (has 2 drop down leaves). Found silver hear resistant fabric on Amazon.
https://www.amazon.com/Thermal-Resis...7GPZSYVF&psc=1 and
https://www.amazon.com/gp/product/B0...HLBRDID3&psc=1 (45 wide). Thought about sewing elastic to run under the table to secure it. What else would I need to protect the table top from warping?