Surfaces should be sound, dry, clean and free from damp, dust and grease.
Apply in a thin layer, using a filler knife or trowel, pressing into cavities. If a deeper repair is required, build up the filler in thinner layers, or use Bartoline All Purpose Ready Mixed Filler, followed by the fine surface filler. For a perfect finish fill slightly proud of the surrounding surface and use fine abrasive to blend in the repair.
Tools and equipment should be cleaned with water immediately after use. Replace cap/lid after use to prevent any unused filler from drying out. Wash hands with soap and water after use.