While it's not conventional, you can technically use aluminum foil facing as a makeshift pizza crust in a pinch. However, it won't provide the same texture or taste as a traditional crust. Aluminum foil is not designed for consumption and lacks the nutritional value of a real pizza crust. It's advisable to use a proper pizza dough or a store-bought crust for the best results. If you're in a bind, consider alternatives like using a tortilla or flatbread for a makeshift crust.