Was given a used Weber Kettle, cleaned it up with soap and water, took the ash/vent cleaner apart and got it working properly. The cooking grate was rusted bad, wire brush and steel wool wouldn’t touch it. I’ve ordered a new one and did some research on Weber’s website on preventing rust formation on the cooking grates, all they say is to oil the food is better than oiling the grate. Looking on Buy and Sell sites every used charcoal grill the cooking grates all show rust. I’m thinking I will oil the cold grate and wash it thoroughly after each use. Is there anyway to prevent the formation of rust?