A rag dragged across soot almost always drives it deeper into whatever's underneath. Soot Cleanup avoids that by matching the tool to the surface class first.
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Treating both classes the same way is the most common soot-cleanup mistake.
Using the wrong tool on either class tends to make the residue worse.
Metal fixtures get attention early since acidic residue starts pitting fast.
Fine particulate captured rather than recirculated back into the air.

Dry-chemical sponge work lifts embedded particulate without pushing it deeper.
HEPA extraction pulls particulate before any wet cleaning ever touches the fiber.
A completely different chemistry than what porous drywall responds to.
This track gets prioritized first because the corrosion clock doesn't pause for anything else.
Sequencing matters as much as the cleaning technique itself.
A property can look clean and still be recirculating particulate through the ducts.
A technician answers and mobilizes the nearest available crew.
No return trip needed once the surface classification is done.
You see the plan split by surface class before approving anything.
Both tracks get worked through to a final inspection you sign off on.
"I didn't realize our drywall and our tile backsplash needed totally different cleaning approaches until they explained the classification step." — Homeowner, National Park
"They got to our kitchen faucet fast enough that it never even started pitting, which the adjuster said was lucky timing on our part." — Homeowner, National Park, NJ
"Watching them vacuum the carpet before doing anything wet made sense once they explained wetting soot-loaded fiber just sets the stain." — Homeowner, National Park
The wrong method on either class tends to spread or set the residue worse.
Classification happens before any cleaning tool comes out.
That window is a major reason response speed matters here.
Cleaning reduces odor, but persistent smell sometimes needs a separate treatment.
Yes, as long as HEPA extraction happens before any wet cleaning step.
Response times stay short across National Park specifically because the corrosion window on metal fixtures doesn't wait.
