Rust streaks

[Seasparrow]

[/ATTACH]Hello all,

I would like your thoughts on a problem in the roof rack area near the rear hatch. Under the rear hatch I see very small rust streaks on each side from under the roof rack piece (channel) that attaches to the roof itself. My eyes are not that good but after blowing up the image they appear to be cracks. My 04 Sprt Edtn is amazingly rust free, and I intend to make this my last vehicle and this kind of worries me. I used the search feature but saw nothing.

Thanks for any info.