How would y'all attack this circle paint chip on the door? Looks like surface rust is starting to form and it's lifting a little.

 

That looks pretty big. I would sand down the area with 1000 or 1500 grit using a hole puncher to punch out small circles that you can super glue to the end of a pencil eraser. I would then paint on some primer. With an area that large, a brush touch up isnt going to look great so it would be a good candidate for an airbrush or even rattle can touch up if you are keeping this as DIY.

If it were me though, I would use a vinyl color matched touch up sheet by ColorXlabs. Its basically a sticker the same color as your paint and clear coat. It looks pretty good considering. I would use that until you have the entire panel repainted, or just keep it there since its lower on the door and not very noticeable.

 

I just purchased my RC used with this dent/chip being the only major exterior defect. Cost me $450 to have it professionally repaired. If I didn't the salt here would just continue to eat away at it.

 

Damn that's big and looks like rusting inside already?