Surfaces must be clean, dry and free from all defective and poorly adhering material, dirt, grease and salts. Dry sanding, flame cutting and/or welding of the dry paint film will give rise to dust and/or hazardous fumes. Wet sanding/flatting should be used wherever possible. If exposure cannot be avoided by the provision of local exhaust ventilation, suitable respiratory protective equipment should be used. To fill and coat the surfaces: Use STOKOS VIVEDUR. For new or coated surfaces with chalking: Prime with ASTARI VIVEDUR solvent based primer thinned up to 20% with brush solvent or VIVECRYL PRIMER thinned up to 30% with clean water.