Quote:
Originally Posted by nelsonevv@gmail.com
I have rust looking stains on an unpainted driveway from my
golf cart batteries. I have tried everything but can not get them
off. Does anyone know from experience what to use.
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Too many links to post them all but this link will give you some choices to choose from

Fairly hazardous due to the acids needed..
Google
Also some videos on You Tube
remove battery acid stains from concrete - YouTube
Snowcap Product mentioned in post 12 might help too.