Depending on where the stain is on your bath, i suggest testing a small, ideally hidden, part of your bath with some cola for 15 mins or so to see if you could try muriatic acid.
25+ How Do I Get Rust Stains Out Of My Bathtub
Pics. I recently got 40 years of rust stains off a fibreglass boat in a couple of minutes. The secret is to get clever and creative with how to save time and money every day!
Deep Clean: How To Remove Yellow Bathtub Stains Without ... from xcleaning.net
I have two rust colored stains on my bathroom vanity. An excellent product that i have used to get out rust stains is called whisk rust stain remover. Rust stains might look super unsightly, but there are actually quite a few ways to get them out of your home once and for all.
I always use it to get out rust stains.
Rust stains are caused by the presence of dissolved iron in drinking water. A tube of chapstick found its way into my dryer and melted allover several blouses. Rust in the bathroom is usually the result of two related situations. Make sure they are safe to use on the particular finish of your bathtub.