Application : Brush only. For health and safety reasons related to all solvent-based paints, spray application is not recommended. STIR THOROUGHLY BEFORE USE. Apply 1 coat of the appropriate coloured Weathershield Exterior Flexible Undercoat to all primed wood (Recommend using with part 1, 1 coat of Weathershield Preservative Primer+ (BP) to new or bare wood). Apply a second coat of Weathershield Exterior Flexible Undercoat overall, followed by part 3, 1 coat of Weathershield Exterior High Gloss. Where a special process colour is to be used, or where a strong colour change is required, additional coats will be required (see appropriate Dulux Trade colour card).