wrote in message
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I have a new asphalt driveway and, dumb me, I dropped a small bag of
concrete mix (sakrete) on it. The bag burst. After I cleaned up the
small mess, I see that it left a whitish area which really spoils the
new look of the driveway. I thought rain would clean it up but it
didn't. Is there any kind of cleaner I can try?

they sell stuff to take grout haze off tiles. phospheric acid i believe. you
could first try with a weaker acid, like vinegar and a stiff scrub brush.