I think its not pure stainless

On Copilot Search I found this: To remove surface rust from stainless steel, you can use the following methods: "Baking Soda Paste: Mix baking soda with water to create a paste. Apply it to the rusted area, let it sit for a few minutes, then scrub with a soft cloth or sponge furniturix.com Vinegar: Soak a cloth in white vinegar and place it on the rusted area for a few minutes. Wipe it off with a clean cloth furniturix.com Commercial Rust Removers: Use a commercial rust remover specifically designed for stainless steel. Follow the manufacturer's instructions for application Bob Vila Non-Abrasive Scrubbing: Use a non-abrasive scrubbing pad or cloth to gently scrub the rusted area, avoiding any harsh materials that could scratch the surface furniturix.com Preventive Care: Regularly clean and dry your stainless steel items to prevent rust from forming in the future homecleanexpert.com These methods can effectively eliminate rust without damaging the stainless steel surface."

I didn’t think stainless steel rusted either.

I know they don’t last forever and will eventually rust. From what I’ve learned, the chromium coating that protects them can wear down over time, and when water, bleach, or other harsh cleaners reach the iron, it will naturally rust or oxidize. It’s also said that salt and other harsh chemicals can strip away the chromium coating from the steel.

I have no idea about this. I would think that you wouldn't get rust on stainless steel.

Stainless surfaces can get rusty if they have been scratched Rust will show if the scratches have penetrated the top surface I think your method was fine

I think I learned something today. I use that method of I run into the same challenge