First thing to try is industrial acetone that you buy at any hardware store. Put it on a soft rag to scrub a bit. It may take several tries, but should work. Just be careful not to get the acetone on any of the stained wood.
Secondly, Bar Keepers Friend in a soft paste. On polished marble don't scrub really hard, just kind of buff the area. Rinse with water or acetone on a rag.
After you have a clean surface, reseal the stone with a professional stone sealer.
My mother gave me a couple of old marble table tops that her brother had made. Each of them had rust stains on them that had been there for years. I called my uncle and asked him if there was any way to get the stains out, he said the best way was to use alot of elbow grease and a soft rag and Turtle Wax Polishing Compound and then buff it up a little. Believe it or not it worked like a charm and they look like new.
Another idea to try(If the marble is colored,try covering with a mixture of salt and lemon juice and leave until it's worked.Rinse with water and soda mix.Rinse again.)NEVER, EVER, NEVER use lemon juice on marble. Lemon juice is an acid and it will just etch the stone. On a polished surface it will take the polish right off.
Be careful trying either the CLR (label says it shouldn't be used on stone) or the home remedy above because it may cause etching on your marble. I've heard Singerman's Concrete Rust Remover worked, but only applying it for a couple minutes at a time.
It is advisable not to use acid cleaners on countertops. The top surface can be gradually dissolved by acids and expose the layer underneath and cause a lot of damage.
Natural Formula to Use:
A mixture of baking soda and warm water
Method to Use:
1.Make up the mixture of water and baking soda
2.Scrub stains with a soft brush or sponge
3.Rinse thoroughly with water to remove all residue
Tip:
When scrubbing the stains be careful to rub gently as once the surface has been scratched it easily picks up any grease, dirt or soap residue.
I have rust stains in my kitchen sink. What tools or products are available for cleaning rust from sinks without scratching them?
Whink Rust Remover will quickly get rid of rust stains and best of all it requires no scrubbing.
candid eeingti
Go to the chemist and buy some Rust O Ban, works wonders on everything I bought it to remove rust from clothing. I use it on everything.
i have found trying baking soda made into a paste and a scrub brush. if that doesnt work CLR takes most rust stains out.
1/3 liquid softener w/ 2/3 water - Clean and polish with a soft cloth. This is another tip from a book I reference frequently, Talking Dirty with the Queen of Clean by Linda Cobb. She includes additional tips for maintaining marble such as cleaning difficult spots, buffing scratches, and removing stains caused by grease, rust, tea, coffee, ink, etc.
coca cola (soda) is the best to remove anything from rust to grese grass stain excet.
As long as the gel coat is not damaged. You can use an acetone on a non abrasive rag. It will clean the rust stain right off
Oxalic acid (one teaspoon) to remove rust and iron stains
Never Dull works well with some elbow grease.
water the part with the rust on it, then use a big knife to get the rust hold it up and hold it down keep on doing it until the rust will disappear? not sure ok... just saw it in others....
To remove rust stains from fabric, lay it on paper towels. Soak the stains with fresh lemon juice (Bottled ones work too). Lay the paper towels with the fabric out in the sun to dry. the stains will disappear. Wash as normal aftewards.