Bilt hamber auto clay is a paint smoothing bar designed to get your paintwork looking great and to keep it staying that way by removing harmful contamination from vehicle paint finishes bilt hamber auto clay improves the durability of your paint work and increases the gloss level of subsequent waxes auto clay removes particles from your cars paintwork which cant be removed by washing waxing or polishing such as brake dust insect residue bird droppings or tree sap use of auto clay will