Clean and degrease hard surfaces prior to painting to improve paint bonding. Preps-it is a ready-to-use product recommended for use in cleaning and preparing indoor and outdoor surfaces for painting with latex (water-based) paints and coatings. Dampen a clean cloth liberally with Preps-it and apply full strength over an area of 3 or 4 sq. ft. at a time. Thoroughly rinse with water and allow to dry before refinishing. 32 oz. trigger spray.