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 car’s paintwork which can’t be removed by washing, waxing or polishing such as brake dust, insect residue, bird droppings or tree sap. Use of auto-clay will leave a glass smooth ultra clean finish ready for waxing. Bilt Hamber clays are supplied as a 200g bar – that’s TWICE THE SIZE of many other bars! And unlike most competitors, Bilt Hamber clay bars don’t require a separate special lubricant; ordinary tap water can be used. Comes with full instructions. Our top tip – keep the surface good and wet!