How do you remove rust from heating vents?

Try white vinegar to remove rust in one of three ways: Spray the rust with a half-and-half solution of white vinegar and water, make a paste with white vinegar and salt, or soak badly rusted heat registers in straight white vinegar overnight. Scrub the rust away with the toothbrush.Click to see full answer. Also, why are my air vents rusting?If you have vent covers in your rooms, you may notice when they start becoming rusty. Rust is usually caused by moisture hitting the metal and then corroding the cover. This rust can look unattractive and it can also encourage mold or bacteria, so is not a good idea over a ventilation system.Beside above, how do I get rust off my heater? Remove rust and flaking paint from the heater cover using a wire brush. Sand the surface using fine-grit sandpaper. Remove dirt and sanding dust from the heater cover using a clean cloth and a degreasing cleaner. Allow the cover to dry completely. In this regard, how do you clean old heat vents? Here’s what to do: Turn off the power connected to the heating and air conditioning system [source: Reliable Remodeler]. Unscrew the air duct covers or grilles from the walls. Use your brush to clean the grates thoroughly. Vacuum the ducts as much as possible. Clean the grilles in your ceiling. How do you fix a rusty duct? Repainting ducts with the correct paint will remove rust and eliminate expensive repairs. Turn off the central heating. Run a wire brush over the surface of the ductwork until all loose particles of paint, rust and dirt are removed from its surface. Put on chemical resistant gloves.