I have a large and very handy spoon that is evidently made of non-stainless steel. Over time, it rusts. I was wondering if there is a commercial coating I could apply to seal the metal, that is durable enough to withstand hot water and ideally dishwasher soap. I know that a coat of mineral oil would do the job, but I'd just need to apply it regularly. Now, I understand that fishermen have coatings and corrosion inhibitors that they use for knives and hooks. I'm wondering if I want to get that stuff in my food.