Does Bucky's arm rust when it gets wet??
Super good question
MCU wise we don’t have too much canon info on his arm, I did hear a pretty good theory that it’s coated with titanium alloy.
Obviously he gets it wet multiple times and it still seems to be in working condition, knowing Hydra it would be constantly getting upgraded and seeing as winter soldiers missions would see him in all types of environments I’d say they’d have taken measures to prevent rusting etc, we also assume he has enough knowledge of it to perform basic maintenance on it if need be, he doesn’t even seemed concerned about getting it wet either.
Sorry if that isn’t the most coherent answer I’m super exhausted
If anyone has any info/theories please add them x