My wife had this due to high iron content in our deep well. I tried it on some rusted harness iron. I was quite impressed with the results. I didn’t do any before & after shots. I will do more items and show the results. I’m not recommending this product yet. As with any chemical, read the label and follow the precautions. If this has been discussed on TNet previously, I apologize for reiterating. 👍🏼