Fireproofing or Paint Overspray Lands on Exposed Retail Duct

Fast answer

Stop aggressive cleaning until the duct finish and contaminant are identified. Protect adjacent work, document the affected area, and use the project-approved cleaning or restoration method.

What to check

1. Identify whether the material is fireproofing, primer, paint, texture, concrete slurry, or another contaminant.
2. Determine the duct finish and whether the surface is visible architectural work.
3. Photograph the extent and check whether contamination entered open duct.
4. Coordinate protection before nearby spraying continues.

Do not

Do not scrape, wire-brush, or use strong solvents on finished duct without approval.

Ask the foreman

“The exposed sales-floor duct has fireproofing overspray on the visible side. I identified the finish and photographed the area. What approved cleaning method do you want used, and should this run be protected before spraying resumes?”

Why it matters

Cleaning can damage galvanizing, paint, coatings, sealant, and the final appearance if the method is guessed.