Naturally Repair Wood With Vinegar and Canola Oil. ~ Use cup of oil, add cup vinegar. white or apple cider vinegar, mix it in a jar, then rub it into the wood. You don’t need to wipe it off; the wood just soaks it in.
Before painting galvanized metal or concrete, wipe down the object or surface with vinegar, using a sponge or lint-free cloth. This little trick will help your paint job last longer. (Not that you would want to paint galvanized metal!