I've sprayed smaller tanks too. The reason I don't anymore is because you have to cover everything you don't want overspray on,and you will probably have to do it outside. If you roll,then you just tape the glass on the sides,and the trim. You don't really even need to do this. You will never see the back,so if you get paint on the trim,no big deal. And if you get paint on the sides,you could scrape it off. I always tape them off though. It's easy to do.