Nov 29, 2019· How to get rid of rust on metal with vinegar: The definitive approach. Step 1: Determine the object size. Step 2: Creating the solution. Step 3: Start the soak. Step 4: Scrub off the excess rust. Step 5: Apply a cleaning solution with a proper ratio of baking soda to vinegar for cleaning. Step 6: Give it a final rinse with clear water.