SKU: AV73601 | Brand: Vallejo | Product: Vallejo Surface Primer Grey 60 ml Vallejo Surface Primer in grey is an acrylic polyurethane formulation in water-based solution. This primer suits all surface types including resin, PVC, brass, white metal, and wood. Multiple coats build a durable, even film that preserves fine model details and enhances subsequent paint adhesion. Dries rapidly to full strength within hours. Apply undiluted or thin with Vallejo Airbrush Thinner or Flow Improver. Optimal airbrush pressure: 15–20 PSI (0.5–1 kg). Maintain equipment with Vallejo Airbrush Cleaner. Non-flammable, solvent-free formula.