Hey guys I got 2003 lancer with tiny bits of surface rust on the top of door frame (black part above glass). From googling seems like a common issue for those models due to thin paint on those parts.

i was wondering if anyone has some sort of experience DIY repairing it? It’s not too bad right now, I just don’t want it to spread.

its on all 4 doors.

here are some pictures - https://imgur.com/a/HgbUM6b