Case Study: Cleaning Up a Vandalized Seattle Art Exhibit
By James Hebel, Owner, Seattle Surface Cleaners
We got a call from a gallery manager in Seattle’s art district. Someone had spray-painted across an outdoor art installation overnight — multiple pieces, different paint colors, extensive coverage. The exhibit was scheduled for a public event in 48 hours.
This is the kind of job that tests everything we know about graffiti removal: multiple surface types, time pressure, and the added complication of preserving the original artwork underneath.
The Challenge
The installation included painted metal, sealed wood, and coated concrete. Each surface requires a different removal approach. Using the wrong chemical or too much pressure on the wrong material would damage the original artwork — which would be worse than the graffiti itself.
We had spray paint (Krylon and Rust-Oleum based on the finish), marker tags on two pieces, and what looked like a paint roller used on the concrete base. Three different removal challenges on one job.
Our Approach
- Surface assessment: We tested a small hidden area on each surface type to determine the right solvent and method before touching the visible damage.
- Metal pieces: Chemical removal using a graffiti-specific solvent that dissolves spray paint without affecting the powder-coated finish underneath. Applied by hand, not sprayed, to control coverage precisely.
- Wood panels: Gentle chemical application followed by light pressure washing at low PSI. Wood is the trickiest — too much pressure blows out the grain, too little leaves ghost marks.
- Concrete base: Hot water pressure washing at higher PSI with a surface cleaner attachment. Concrete is forgiving compared to the other surfaces.
- Final inspection: Went over every piece with the gallery manager to confirm no damage to original finishes.
Result
Total time on site: 6 hours with a two-person crew. All graffiti removed. No damage to original artwork. The exhibit opened on schedule.
The gallery manager signed up for a recurring graffiti monitoring and rapid response program after that. Prevention through fast response is always better than dealing with accumulation.
What We Learned
Art installations and murals are some of the most challenging graffiti removal jobs because you’re working to preserve one layer of paint while removing another. We recommend anti-graffiti coatings for any public art installation — it makes future removal faster, cheaper, and less risky to the original work.
Dealing with graffiti on your property? Contact us or call (206) 503-3712 for same-day response.
