Before using this product ensure all surfaces to be painted are clean (no dirt, grease, rust or flaking paint) and dry. Areas affected by mould, algae or fungi should be treated with an appropriate fungicidal wash. Sand down the surface to remove any sheen. Refer to health and safety information. Metal Remove rust using Hammerite Rust Remover. On new galvanized surfaces, allow to weather for six months before application. New bare wood To ensure 6 year weather protection is achieved, prepare bare wood with Weathershield Exterior Preservative Primer+ (BP), wiping off any excess. Surface defects should be repaired using the appropriate Polycell product. uPVC Apply direct to clean substrate.