The best way to treat oxidation is to reduce rust buildup and prevent it from becoming a problem. Start by keeping your RV out of the hot sun and keep it as dry as possible. After a wash or trek through a rainstorm, take a few minutes to dry down the areas where you notice rust problems such as the roof and hood. Once a month, take a few minutes to give the RV a thorough once-over, looking for any signs of holes or damage. When you spot a hole, seal it up, which keeps rust from forming in those areas by preventing water from entering the spot. You can also wax and polish your RV at least once a month to help protect against water damage.
One type of home remedy for oxidation uses acid as the main base. The acid works by slowly sloughing off the rust and removing any signs that it existed. You'll want to use something with a high acid level such as lemon juice, vinegar or even Coca-Cola. Apply a layer of liquid to the rust or oxidation and let it sit for five to 10 minutes. Then take a coarse brush such as a metal or wire brush and scrape the liquid against the rust. Rinse off the liquid with cold water and repeat where you see rust still formed. Another option is to combine equal parts lemon juice and table salt and use it in the same way. This works as both an acid and a corrosive remedy.
Corrosive remedies for RV oxidation work by forcing the rust off the camper. You can use several different things here, including toothpaste. The best is known as Barkeeper's Friend, which is made of oxalic acid and works to remove debris, oxidation and other problems from metal surfaces. You'll need to use a small amount of water with this because it's a powder-like substance. Pour the powder directly on the surface and add water over top to make a thin paste. Scrub the powder and water combination and the flakes of rust should start falling off. Rinse off with fresh water.
