Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to remove rust from metal [title] Use white vinegar. [step] The vinegar reacts with the rust to dissolve it off of the metal. To use, soak the metal in white vinegar for a few hours and then scrub the rusty paste off.

Ending1: If there is rust left on the metal, put some white vinegar into a little bit of water and soak it for 15 minutes. Then rinse the metal down with some water and wipe it down with a soft cloth. Ending2: [substeps] If you aren't able to find white vinegar at your local hardware store, you can also use olive oil instead. The oil will help to remove the rust. Ending3: Repeat this treatment every four to five days until rust is removed from the metal. [substeps] White vinegar is available at most hardware and auto parts stores. Ending4: [substeps] If the object is too big to soak directly in the white vinegar, pour a layer over the top and allow it time to set. You can also wipe it down with a rag soaked in vinegar.

Answer format: ending1/ending2/ending3/ending4