Help Needed: Cleaning Concrete

[BigBear]

Hey guys,
I have a 10x10 (ish) patio. It has paint stains, grease, dirt, etc all over it. Is there a way to clean it? I've tried some of the Google-fu stuff (baking powder paste, etc) and nothing is working. It's be nice to just stain it... but it's part of an apartment complex.

Thanks,
Bear

[StagLefty]

Muriatic acid ?

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[SideShow Bob]

Muriatic acid ?

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That will definatly do the job. Keep kids and pets away, and it will kill plants & grass, so use carefully. Also be sure to wear eye protection, chemical resistant gloves and old heavy long sleeve clothing. No shorts either.

[SuperiorDG]

That will definatly do the job. Keep kids and pets away, and it will kill plants & grass, so use carefully. Also be sure to wear eye protection, chemical resistant gloves and old heavy long sleeve clothing. No shorts either.

And don't breath that shit in, it sucks.

Edit: After I've done what I needed done I neutralize it with water and baking soda.

[Eric P]

Phosphoric acid, the green fluid at Home Depot. Muriatic acid may be too strong and eat away too much of the surface leaving exposed coarse aggregates.

[Rabid]

Phosphoric acid, the green fluid at Home Depot. Muriatic acid may be too strong and eat away too much of the surface leaving exposed coarse aggregates.

This but to echo BPTactical why if it is not your place?

[Eric P]

This but to echo BPTactical why if it is not your place?

We do not know why nor need to know why. The op asked a question and an answer was supplied.

Grinding kitty litter into the surface can also draw out grease and oil

[Great-Kazoo]

We do not know why nor need to know why. The op asked a question and an answer was supplied.

Grinding kitty litter into the surface can also draw out grease and oil

Why?
Because the OP's liability IF someones kid has a reaction while playing in the area, dog eating grass, etc. if far more impacting than the need to clean a patio, that may not be his responsibility.

BTW: Kitty litter will work on fresh petroleum spills and not on aged stains. Without use of some chemical for removal.

[Rabid]

We do not know why nor need to know why. The op asked a question and an answer was supplied.

Did someone piss in your Wheaties this morning or do you just need a hug?

[Eric P]

No, its just irrelevant information related to his question. The many replies about responsibility and safety sounded like a lawyers forum, not a shooters forum.