I do not have access to information about the specific properties of Antipodia Schist. However, in general, schist is a metamorphic rock that can have variable durability and weather resistance depending on its mineral composition and structure. It is possible that some types of Antipodia Schist could be suitable for use in exterior applications in sunny climates, but it would be important to consult with a geologist or building material specialist to understand its properties and how it may perform over time in a given climate.