No, it would be best if you only oiled the inside of the smoker. Coat the entire surface of the smoker with the oil of your choice. You can use various kinds, but they don’t make a difference. Next, you should set the temperature to get rid of the metal taste if you are oiling a brand new smoker. Use a standard temperature of 250 degrees Fahrenheit. In this way, you are creating a protective barrier that will prevent your smoker from rusting.