A little baking soda and damp towel should do it.
You can clean rust spots off a porcelain sink easily with a product like Bar Keeper's Friend. This oxalic acid product can be made into paste that removes rust stains. One caution though: rust stains can be permanently set by using a chlorine-based cleaner.
Nothing wrong with windex, it will work ok & not harm Porcelain but may not get everything off it.
"Goof Off grafiti remover" or Acetone
If you can get a hold of a product called "Once Off" by morgan Adhesives then this is your best bet. Goodluck!
If it is vinyl tile and it's latex paint, rubbing alcohol will remove it. If it is a ceramic or porcelain tile, you can carefully scrape it off or if it is also latex paint, the same thing,,,alcohol will remove it.
To effectively remove rust stains from concrete surfaces, you can use a mixture of vinegar and baking soda or a commercial rust remover. Apply the solution to the stain, scrub with a brush, and rinse thoroughly with water. Repeat if necessary until the rust stain is removed.
It depends on whether the tile is glazed or unglazed and what you are trying to clean off. If you are trying to clean a liquid that had seeped into the tile you may be out of luck. It may be permanently stained. If you are trying to do routine maintenance you can use a mop and warm water with a mild tile cleaner.
To remove rust stains from outdoor furniture, start by mixing equal parts of white vinegar and baking soda to create a paste. Apply the paste to the rust-stained areas and let it sit for about 30 minutes before scrubbing gently with a soft brush or cloth. Rinse the furniture thoroughly with water and dry it to prevent further rust formation. For tougher stains, you can also try using a rust remover product specifically designed for outdoor materials.
Heat the wax with a hair dryer and then scrap it of with a spatula (large amounts) or wipe away with a paper towel (smaller amounts)
To clean ceramic wall tile, mix equal parts water and vinegar to create a cleaning solution. Use a soft-bristled brush or sponge to scrub the tiles with the solution, making sure to rinse thoroughly with water afterward. For stubborn stains, you can also use a mild detergent or specialized ceramic tile cleaner.
Try Mr. Clean Magic Erase Sponges. Use them as directed. Iused it for rust on a regular counter and it worked great.
There are many different ways to remove rust, but they may not be safe for food containers. You also have to bear in mind that the container is likely to rust again, and may not be safe for food. Barkeepers Friend is one of the best products on the market not only for rust stains, but for cleaning in general. Leaving a highly concentrated tea (not herbal) may be able to lift stains.