Proper preparation is key to achieving a professional finish and ensuring the durability of Ronseal One Coat Everywhere paint.### Surface Preparation* Previously Painted Walls: Lightly sand any loose or flaking paint to create a smooth surface. Wipe down the walls with a damp cloth to remove dust. If the existing color is very bold or contrasting, apply a suitable basecoat first, or be prepared to apply an additional coat of Ronseal paint.* Bare Plaster: Allow new plaster to dry completely for at least 7 days. Before painting, seal the plaster using a basecoat or a dedicated plaster sealer to prevent the paint from soaking in unevenly.* Bare & Previously Painted Wood: Use 120-grit sandpaper to lightly sand the wood, then wipe away all dust with a damp cloth. Fill any holes or cracks with appropriate wood filler and treat any knots with a knotting solution to prevent resin bleed-through.* Bare & Painted Metal: Sand off any loose or flaking paint and clean the surface thoroughly with a damp cloth to remove dust. *Important*: If you are painting ferrous metals (e.g., steel, cast iron), you must apply a specialist metal primer beforehand to ensure adhesion and prevent rust.### Application & CareEnsure the room is well-ventilated during and after painting. Clean brushes and rollers immediately after use with warm soapy water. The painted surface is washable and stain-resistant once fully cured, making it easy to wipe down with a damp cloth for general cleaning. Avoid harsh abrasive cleaners to preserve the matt finish.