Help with stubborn stain on pavers

Newbie Questions
1

Got this black stain that wont come out and no clue what it even is

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any help please

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2

Looks like spray paint. Try graffiti remover

3

No clue it’s by all the flower beds tried sh mix nothing out oxalic acid and still nothing.

4

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not sure if it might be from the roof

5

I’ve seen it before, might be sap from those hedges, try degreaser

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6

It probably is sap . I just assume he tried straight SH before saying it won’t come off.

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7

Looks like travertine. That’s a very natural stone so be carful what you use on it. It’s easy to discolor . Don’t let it the SH sit long. And don’t use super high pressure.

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8

I think those hedges might be podocarpus (yew plum pine)

I would try scrubbing with degreaser

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9

Try some ebc using a pump up sprayer some where out of sight

10

I had degreaser in my sh mix and nothing will try stright degreaser n scrub tomorrow and yes they are podocarpus and you might be right on the sap

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