Here's a link to an article that may work! Hope this helps!
Thank you very much
I use a Mr. Clean Magic Eraser for tea stains on coffee cups and believe it would work well for the rust stains in your tub as well.
will try Iron Out. Already tried CLR. Thanks.
CLR...calcium, lime, rust-available at walmart and DIY stores.
We had the same problem in one of our tubs - so much iron! Try Iron Out - worked so easily for us: https://amzn.to/2LtnLPA
Thanks! I didn't ask the question, but have tried to remedy the same problem in our 70 year old home. I didn't have too much luck with the CLR and the smell of it made my nose, throat and chest burn for a couple of days. I'll give this a shot!
Iron Out and scrub with something like Scrub Daddy or Magic Eraser.