Grey Wurth Stone Guard Spray protects wheel wells, rocker panels and the undercarriage of your automobile from inevitable damage from stones, debris, salt water, and road chemicals that eat away at the finish. It does this by forming a hard, textured finish that helps prevent chipping and abrasions caused by stones and debris while inhibiting the development of rust. Wurth Stone Guard Spray is a rubber/plastic ultra-protective spray-on coating is easy to apply, tough as nails, and can be painted over, so as to match the color of the car. Stone Guard is ideal for applications where heavy or coarse texture patterns are desired.