Thanks for the link. It totally makes sense.
I've tried testing with 3 different methods with small strips of sheet that I got.
1- Original, 2-Sanded with 40grid sandpaper, 3-Used propane flame to heat treat.
Result: 1 and 2 very easy to peel. 3- harder than 1&2 but still pulled off easily.
I will try contacting Crown tomorrow and order the treated one