Hi Hannah,
Thanks so much for your feedback.
We are sorry to hear that you are experiencing these stains on your new sink. I assure you, they are not rust marks. Typically, when red spots appear on a Stainless Steel Sink like ours it is simply surface discoloration. This is usually taken care of permanently with a stainless steel polish and/or cleaner when used according to the directions of the cleaning product. Products such as Bar Keeper’s friend and a fine 3M Scotch Brite pad are both great options.
Please feel free to reach out to us at 800-775-0703 or via email at customerservice@kraususa.com and we would be happy to assist.