like all other grills , pit boss grills are also made up of metal and are prone to rust. most of their parts can get rusted but some parts are more prone to rusting than others. usually the external side of grill, the area near the burners and the grill grates are the most common areas that are affected by rust. these can get rusted due to various reasons. for example the external side of the grill caan start to rust if it used in rain and not dried completely.similarly the grill grates can start to rust due to coming in direct contact with oils and other lubricants.