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I had to remove the battery from the trunk of my car (German) to do something or other last spring, and was horrified to find a bit of surface rust on one of the weird plughole-shaped metal divit things underneath the battery tray (BMW E46). Those things are strange- they look like body plugs but they’re not, they’re actually part of the sheetmetal. I wirewheeled the rust off, and I *think* I remember using some of the Naval Jelly I have sitting on the shelf, then acetoned it then since I didn’t have any Rust Bullet on hand, I improvised with some good old JB Weld. My logic was deprive the area of oxygen, and the rust will be effectively stopped. It’s about the size of a half dollar. There is no corrosion on the underside of the car at that location. No idea how it started either.
Will JB Weld work like POR or Rust Bullet in this instance or do I have to grind it off and do it right with the proper stuff. I panicked because rust really scares the hell out of me. It’s been keeping me up at night.
Thanks
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