Have a F150 Super Crew, white paint developing rust spots on lower door panels, almost seems rust coming from inside out ...any ideas

 

I have the same problem on my white screw. I seen several people on here say it is from the metallic in the brake pads. The dust is so bad on the stock pads that the dust gets on the side of the truck and begins to rust. I am going to claybar the truck in a few days to get rid of it.

 

Yep, it’s all over my white truck too, I’ve been able to scratch a few off with my fingernail and the paint is fine under, going to clay it too when it’s warmer.

 

I found some pictures of paint contamination and using claybar to remove it.

Thanks again.