Outer Limits 4x4 Board

Hi All
I pulled my rear bumper off to see what I would have do for a body lift.
I have 5 or 6 rust spots under the top lip that holds the bumper skin on.
Has any one with X90 seen this rust spot before?
See Pic.

Had some similar spots on my Vitara (mainly on the front) but mine much older than yours. That's what happens when you're near the beach though....

Water and stuff gets trapped under the bumpers, and doesn't drain out as easy as it should

hmmm, might be time to invest in one of those electronic rust preventors, my junk is always on the beach