This tutorial guide shows how and why to use a clay bar on your car. Test an area, apply lubrication and then run the clay bar over the surface to shear off any embedded contaminants in the paint to make surface perfectly smooth. When you're done claying the vehicle, you can begin polishing the car to correct scratches and imperfections in the paint's clear coat or simply apply a Last Step Product (LSP) like a carnauba wax, ceramic coating, nano coating, paint sealant or liquid wax.