GMN, hehehe, maybe there is a use for Teflon after all!
Seriously though, I believe the melting point of Zaino is several hundred degrees, likely somewhere between 250 and 400. To get an exact figure, your best bet would be to email Mr Zaino and ask.
Keep a lookout though, I believe Zaino is working on a polish that is designed to be used on very hot surfaces and withstand very high temps.
:wavey