With a freshly-clayed car, you're in an optimal position to apply some protective ... Spray some of this stuff down into a small section, then get your clay bar ready. Pro tip: warm up the clay bar in ...

Clay bars are the conventional way of doing this ... so we tested each of the products on three parts of a car. We used a side window, which had been lightly dusted with primer to simulate ...

it was narrowly beaten on our car bonnet. It was still very effective, but Pure Definition had a slight edge. Auto-clay retained its water lubricant, though, which helped tip the balance. The bar ...