... sound, clean, dry and free from loose particles, oil, grease, and all other contaminants; 2. Primer: Mix ... bubbles in the body coat. According to the oil absorption of substrate, a second sealer coat ... Inspection standards for the undercoat: Non-sticky to hand, no softening, no nail print if scratch on ... Inspection standards for the putty: Non-sticky to hand, no softening, no nail print if scratching on ...