Old plumbing can cause rust in the water to leave stains on your bathroom fixtures. Removing these stains can be a challenge. You will need to Several household products, especially salt, lemon and vinegar, can be effective cleaners for removing rust stains in the bathroom. Plastic tubs This is a guide about cleaning rust stains from a plastic bathtub. Old plumbing can cause rust in the water to leave stains on your bathroom fixtures. Removing Because fiberglass is used to coat showers, tubs, boats and other surfaces it’s likely that eventually you’ll have to remove rust stains from your fiberglass items. Don Vandervort’s Home Tips: Bathtub Repairs – Clean a Fiberglass Bathtub Rust Stains on My Fiberglass Bathtub. Dear Mary: And boy does it work well to remove rust stains from just about anything, including fabric. Two houses that I clean have identical bathtubs. It is a semi-textured plastic tub on the bottom. Both have bad rust stains and I cannot get them Rust stain removal can be a process that is easily done. However, it can be a process that needs to be repeated a few times to get the stain completely removed. While commercial cleaners are good for removing hard-water plastic bathtub stains, you can use simple cleaners made from household ingredients to save I figured a rust remover would get off just about as much as was possible. So here is my advice for getting rust stains out of nasty bathtubs… When you remove the dried paste, you’ll find that the stain is gone too. not to get the oven cleaner on your shower curtain; it can ruin both plastic and fabric.