How does this plan sound

Just a quick check to get some feedback on my process. I’ve got a job to clean an amphitheater at a school. It’s not huge but it’s pretty dirty. The construction is natural stone blocks.

  1. Hit a small section with regular HW mix. Let it dwell 5 minutes.
  2. Hit it again with regular HW mix dwell for 10.
  3. Hit it a final time with the same let it dwell for 15 then rinse. Keep it wet between each application.

I think I will know if this is going to be effective at the second application. Assuming it’s not move to a 3% SH solution at the same dwell times. Increase strength as needed.

Hopefully I can be active applying pre wash or on the surface cleaner while I wait this out.

Thanks for any help or suggestions.

I’d probably throw 3-4% on it then turbo nozzle

I’d turbo nozzle it, rinse, ds some bleach on it and leave. There is an expert stone washer on here somewhere :slight_smile:

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Just light er up and get it done.

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Facts

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Id give it more than 5 minute dwell time

My cake recipe has less steps. Hit it with a turbo nozzle and carry on with your day.

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That’s a whole lotta turbo.:flushed:

Wear a face shield and snug cap if possible, that junk is gonna blast all over you.

From time to time some jobs take a bit of effort. This would be a wet one for sure lol.

The worst are the brick pavers people have lining their flowerbeds. They will leave you filthy no matter what

That’s what she said :confused:

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Your right. A longer lance helps a bit. I don’t mind them, except if it’s the first job of the day, hate a wet start to the day lol.

I’m liking the light it up approach. I’ve read some posts where that turned out well.

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We do alot of limestone in my area… Simply mist the stone, don’t soak, then we apply a 50/50 mix per section, dwell time maybe 5 mins, rinse till it runs clear and reapply where needed. Always rinsing between applying mix. Don’t use a turbo nozzle with limestone, unless you want to pick up chunks of stone.

Here’s one we did last week…

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Downstreaming not going to touch that. 3-4% couple of times - 10min in between, rinse off with low-med pressure

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Great work! Thanks for sharing. There’s a ton of this in my area. Looking forward to getting the hang of this.

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There’s a limestone fence at a country club, thought about bidding it. You’re saying 50/50, so 6%? Seems pretty hot.

It’s a strong solution… just be sure to rinse out all chemical before applying again

I posted this one a few months ago. Same process…

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