Weird "bloom" of "cross-hatch" RUST on the roof... Short-term solutions?

[fixizin]

This is usually the DRY and sunny and low-humidity time of year, BUT... not for 2023-2024.

Any-hoo, one morning seems like rust just "bloomed" overnight, over most of the roof exterior, and apparently the factory paint aged/dried-out in a way that makes it LOOK like it had been turbo-scrubbed in 2 directions, with a very coarse brush... but it hasn't. See pics...


This is standing on the driver-side door sill, looking out over right-rear corner of roof.


A close-up of the "cross-hatching"... (Click for full-size...)

Gonna be a while before I can get it sanded, primed, and painted professionally, just need to stop the "cancer" for now, but in a way that doesn't interfere (too much) with the "real" job later on.

Thanks in advance!

 

[broncc]

Looks like your primer failed. You're kinda boned with this.

Short term is probably use a magic eraser to gently get the staining off then put a very thick layer of carnauba wax or clear spray paint if you feel wild. The only fix is to sand to bare metal and do a respray.

 

[fixizin]

Looks like your primer failed. You're kinda boned with this.

Short term is probably use a magic eraser to gently get the staining off then put a very thick layer of carnauba wax...

Thanks much, worked GREAT!... for now.