I’d be inclined to use a dremel tool, but the important thing is to get it right down to the metal no matter what you choose to use. I've used POR-15 products to treat rust small spots on cars with good results. You can do this by either applying paint protection film in areas that are prone to rust or by frequently getting rid of road salts and waxing your car regularly. Touched up with epoxy primer, sanded lightly then used color match pens available at auto stores to repaint area. Remove all of the paint around the hole with a wire brush attachment on your drill. … So as soon as you see nicks, grease it till you can fix it even if it looks like primer is still in tack. The tape should be attached to the roof and a few sheets of newspaper. Make sure you grind all the rust away, sand and feather the area. There is no doubt that you can lower the risks of having small rust spots on your car, by implementing a few preventive measures. http://ehobbytools.com/contents/en-us/p1108.html. Step 1 – Tape off the Area; Once you identify rust spots on your car, you will need to tape off the area. The process of removing rust from car body is easy and touching up takes minutes. Do not repair rust on load bearing parts of the car with body filler and/or fibreglass. There are three spots on the front left fender that have rust on them. If it happens again, a little grease on it to slow the process down till the spirit moves you. Someone had hit the car and the paint came off, so it became rusty. Finding a rust spot on your car might feel like the worst thing in the universe, but it isn’t the end of the world. Here are some rust-prevention tips: Take your car frequently to a touchless car wash that also washes the undercarriage, and especially whenever your car’s been exposed to road salt. Rust forms near windshields easily because of the large weatherstripping found around the windshield. As such, it is important that you repair or fix the rust spots on the car surface on time. Start on the newspaper and sweep over the repaired spot. I noticed a tiny chip of paint on my roof about two years ago- it was rust colored in the chipped area when I first saw it. Now you have a spray shield to put the primer on. Once rust is present on your car, it can spread easily under the paint and cause major structural damage. How to fix rust spots on your car. All the rust was gone. I would prime it after removing the rust. After 2 years, the metal is probably pitted. Don’t stop moving the spray around until the spot is covered. Using a rust converter type primer would transform the rust in the pits to a benign compound and protect the bare metal. However, mix the car soap with a bit of water, and rub it on the affected area. Minor Rust Repairs: A very small rust spot on the body of your car is relatively easy to fix, as you might expect. The rust has already removed metal by oxidation. In heavy salted areas, the pitting could go all the way through. Two simple power tools, a few finishing supplies and rubbing compound are all you need to make that rust spot disappear on your car or truck. Someone had hit the car and the paint came off, so it became rusty. Sand until the rust is gone and the hard edges of the paint around the chip are smooth. You could set the car (and yourself) on fire when you light up. Follow the directions, and wear gloves when you use it. If you ignore rust spots on your car, they'll spread and turn your sheet metal into Swiss cheese in no time. There is no doubt that you can lower the risks of having small rust spots on your car, by implementing a few preventive measures. Using a rust converter type primer would transform the rust in the pits to a benign compound and protect the bare metal. Switch to 120-grit sandpaper to feather the edges of the repair area. Step 1. Sand through the rust spots down to the bare metal, using 40-grit sandpaper. 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