I just removed the door guards from my Mazda 6 as they were falling off. I cleaned off the expected dirt ring with a claybar and the dirt came off. But only the driver side door is flawless. The other three doors have what looks like paint splatter where the door guard strip was.
This picture shows the driver side door, then the outline on the rear door.
More images of the outline.
Would careful wet sanding fix this so I wont have an outline anymore?