Surface Preparation - Before using this product ensure all surfaces to be painted are clean (no dirt, grease, rust or flaking paint) and dry. Instructions for Use - 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 Exterior Preservative Primer+ (BP), wiping off any excess. Surface defects should be repaired using the appropriate Polycell product. uPVC: Apply direct to clean substrate. TIP: Apply Dulux Multisurface only in dry conditions, above 10°C and when bad weather is not forecast. The use of light colours only, particularly on south facing elevations is recommended to avoid solar heat again damaging the Upvc.