Flow-Through Holes Flush Debris Thin & Compact to Conform to Contours Fine Grade for Minimal Paint Damage This perforated clay towel for cars features small flow-through holes which effortlessly lift and flush away contaminants from your vehicle's paint surface, as you remove embedded contaminates. Generously and continuously apply lubrication to the perforated towel and paint surface. On first use, scrub the paint decontamination towel on a glass surface, with lubrication, to break in the clay.