When is a clean car not a clean car? When it hasn’t been clayed! Once the preserve of auto care specialists, clay bars shift the tree sap, tar, brake dust and bird muck that soap and water on their ...

Grabbing a lump of clay and running it on a car’s delicate paintwork might seem crazy to anyone unfamiliar with car-care products, but it is often the best way of removing stubborn contaminants that ...