Does white vinegar actually remove rust?

Yes, white vinegar actually does remove rust effectively for light to moderate surface rust on small metal items, tools, and hardware, due to its acetic acid content that dissolves iron oxide, though it has limitations for heavy rust. White distilled vinegar typically contains 5 percent acetic acid, which reacts with rust, iron oxide, to form water soluble iron acetate that can be scrubbed off. To use, soak small rusty items like bolts, tools, or screws in undiluted white vinegar for 2 to 12 hours, then scrub with wire brush or steel wool, rinse with water, and dry immediately to prevent flash rust. For larger surfaces, you can soak cloth in vinegar and apply to rusty area, or spray vinegar and let sit. Vinegar works best on light surface rust, not thick flaky rust that requires mechanical removal first. It is inexpensive, non-toxic compared to chemical rust removers, and readily available. Limitations include that vinegar can also attack base metal if left too long, especially on thin or delicate items, causing pitting, so do not soak longer than 24 hours. After removing rust, you must neutralize acid by rinsing and applying primer quickly, such as Rust-Oleum Rusty Metal Primer, to prevent rust returning. For heavy rust, stronger acids like phosphoric acid in products like Evapo-Rust or Corroseal are more effective. Vinegar smell dissipates after rinsing.