How do i clean up a polyurethane stain from a composite deck?

To clean polyurethane stains from a composite deck, you'll need to be cautious to avoid damaging the decking material. Here’s a step-by-step approach: 1. **Gather Supplies**: You'll need a plastic scraper, a soft cloth, mineral spirits or a specialized composite deck cleaner, and a bucket of warm water with mild soap. 2. **Test a Small Area**: Before applying any cleaner, test it on a small, inconspicuous area of the deck to ensure it won’t cause discoloration. 3. **Scrape Off Excess**: Use the plastic scraper to gently remove any thick layers of the polyurethane. Be careful not to scratch the surface. 4. **Apply Cleaner**: Dampen a soft cloth with mineral spirits or the composite cleaner and gently rub the stained area. Let it sit for a few minutes to break down the stain. 5. **Rinse Thoroughly**: After the stain has lifted, rinse the area with warm, soapy water to remove any cleaner residue. 6. **Dry the Area**: Allow the deck to dry completely before walking on it. If the stains are extensive or you’re unsure about doing it yourself, consider hiring a professional who specializes in deck cleaning. Costs for professional cleaning can range from $100 to $300, depending on your location and the extent of the staining. As a next step, you might want to get 2–3 local quotes on Handyman.com to find a reliable service. — Assisted answer