- 1). Insert a wire wheel brush into a drill, just as you do any drill bit.
- 2). Put on safety glasses to protect yourself from injury and press the trigger on the drill. Hold the wire wheel at an angle and lower it until it touches the rusty surface. Move it slowly over the rusted area until it is smooth to the touch.
- 3). Place an 80-grit sandpaper onto a sanding block and sand the surface of the rusty area to further smooth it out. After sanding for 1 to 2 minutes, remove the sandpaper and replace it with a 120 grit. Repeat the process, sanding an additional one to two minutes.
- 4). Fill a bucket with a gallon of hot water and 2 to 3 tsp. of dish soap. Dip a scrub brush into the water and use it to scrub away any dirt and grease from the surface of the entire mobile home roof.
- 5). Rinse the roof off with a garden hose and allow it to dry completely.
- 6). Open a can of metal roof primer that is high in zinc. Dip a paintbrush into the can and paint over the entire area where the rust was. Extend the primer out 1 inch beyond the perimeter of the repair spot. Allow the primer to dry completely before proceeding.
- 7). Pour a galvanized iron primer into a paint tray. Dip a paint roller with an extension handle into the primer and apply a single coat over the entire surface of the roof to seal it.
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