Sharp Carousel Convection Microwave Do Sharp Microwave-Convection Ovens Use Only A Metal Carousel Dish?

Do Sharp Microwave-Convection ovens use only a metal carousel dish? - sharp carousel convection microwave

I gave R9H84B model Sharp microwave convection oven. He came with a metal plate on the carousel. I've never used metal in the microwave and Sharp no longer supports this model. I will not spoil for the first time out.