Grit Guard is a company that was started with one simple vision: to help car owners and enthusiasts prevent swirl marks and scratches in their vehicles finish (paint). Like you, we take care of our cars, mechanically and cosmetically, and the first step in any car care processes always involves washing the car. We invented the Grit Guard to help car owners, detailer's, and enthusiasts prevent swirl marks and scratches in their paint jobs.