That is funny how the sun often damages those mats and yet Ellen had the sun reverse the damage. That is the first time I ever heard of fixing a warped mat. Congratulations Ellen!, Good luck Ginger.
Once I had a mat outside in bitter freezing weather. It was flapping along strapped to my cart with the sewing machine. I went over a curb and the thing slid out and SHATTERED into thousands of pieces! No fixing that mat.