Application: Brush only. Do not spray. STIR THOROUGHLY BEFORE USE. Treat any knots in wood with an appropriate knotting solution. New or bare surfaces: Prime all bare wood with 2 coats of Weathershield Preservative Primer +(BP) followed by 2 coats of Weathershield Quick Dry Exterior Undercoat. Previously painted surfaces: 1 coat of Weathershield Quick Dry Exterior Undercoat. Finishing: Allow to dry for a minimum of 2 hours between coats, then apply the appropriate Weathershield topcoat.