1998 BMW is starting to get some rust on the doors and other places in external body

I have a question: My 1998 BMW is starting to get some rust on the doors and other places in external body. The engine is safe though. The car/paint looks great otherwise. Can I stop the rust? Can I remove the existing patches of rust which are at couple of places each around 2 * 2 inches spot? Thanks.”

OK, rust, as Neil Young once crooned, Never Sleeps. Once it starts, you must remove all the rust down to the bare metal. SO, if you want to cut out all the rust, you can stop it. First, try to sand down all the rust to the bare metal. If you hit metal and don’t make a hole, then coat this bare metal with a metal preservative coating which you can buy at any auto parts store. Once this dries, then paint that over hours later with grey primer paint. Then once that dries in a few hours put the color paint of your car back on. If the rust is bad and you end up with holes, you can patch them with fiberglass or Bondo material. Then just follow the other steps I just gave to keep the rust from coming back. Good Luck,