Been looking at some dryers and some are 20 years old with little to no rust and some that are 5 years or less that are totally rusted out. I would like to buy a mix dryer but it’s seams that they don’t come in stainless steel only galvanized. The tower dryers are stainless. I’m leaning towards the mix dryer because of bushel weight for corn so they say. So my question is how do you keep a dryer from rusting?