Removing a runoff stain

I’ve hit this area 3 times with SH and it has only faded mildly. Any ideas on what it could be and how I can remove it? If it was rust, I would F9 Barc it. However, there isn’t rust there. No exposed nailhead, etc.
Thanks in advance!

Maybe try one restore. Also I’ve found if stucco or eifs is really bad it’ll leave a shadow

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I’ve had stucco I’ve had to hit with 5% 4-5 times. Did you try lightly brushing?

You can try what Nick suggested above, but we’re not miracle workers. Some stains are meant to be, and paint was invented, lol.

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I’ll check into one restore. Thanks guys!