I like the Tamiya cutting mats because of the quick reference measurements, but I have to say I am not very impressed with the heat resistance. I was forming a bit of 2 mil styrene with a MUJI TRAVEL HAIRDRYER, not a heat gun, and it warped my mat beyond all believable bounds. Seriously, it never occurred to Tamiya that a cutting mat for modeling might come into contact with temperatures slightly above room? So Now I am stuck with a (very) expensive for the UK piece of sculpture. I tried re heating it with said hairdryer and piling Argos catalogs on top, but when it cooled it went back to Frito shaped. I am open to any suggestions on how to fix this.