New or Bare Surfaces: New or bare surfaces must be clean, dry and free from efflorescent salts. Remove all loose, defective or poorly adhering material by rubbing down using a suitable abrasive paper or stiff fiber brush and dust off. Treat any areas affected by mould, lichens, algae & moss with bleach. After priming new surfaces with Dulux Interior Acrylic Primer, fill the surface with Dulux Interior Acrylic Putty. Scuff the surface with suitable sand paper and dust off (refer to PDS for correct application procedure). Apply primer on a wall putty before application of topcoat. Previously Painted Sound Surfaces: Remove all loose, defective or poorly adhering material by rubbing down using a suitable abrasive paper or stiff fiber brush and dust off. Spot prime and fill the surface as described above if required. Powdery, Dusty and Cracked Surfaces: Make good minor defects. For larger holes and cracks, use sand and cement mixture. Allow the surface to dry. Prepare surface as described above.