These products that use stainless steel materials to clean are perfect for most types of grates, with one exception: porcelain. If you have porcelain grates, you might already know that using metal utensils runs the risk of chipping and scratching them. For all of you outdoor cooks that have porcelain, you are going to need to invest in models that use nylon bristles or wood. These designs might not clean as well, but you will be protecting your grates from becoming damaged and needing to be replaced.