Rinse the tempered pizza pan with water. Put on protective gloves and goggles or other protective eyewear. Generously sprinkle oxalic acid cleanser on the pan. Wait one minute, then scrub the pan with a nylon scrubber. Pay special attention to the rusted areas. Rinse and repeat, if necessary.
Spray the pan with water displacement lubricant if any rust remains. Allow the spray to sit for five minutes, then scrub the pan with a nylon scrubber.
Wash the pizza pan with dish soap and water to remove all the residue from the cleaning agents. Dry the pan with a microfiber cloth.
Preheat the oven to 450 degrees Fahrenheit. Pour about 2 tablespoons of vegetable oil into the pizza pan. Coat the inside of the pan evenly with the oil by wiping the oil in the pan with a paper towel. Place the oiled pan in the oven for 20 minutes. Alternatively, run the oiled pan through a pizza oven. This will reseason the pan, so pizza won't stick to it.