Please note to keep the finish in good condition follow the care instructions listed below. You can get a reaction to the chrome or gold plating if a steel socket is used to tighten them. Remedy - cover the bolts with something when tightening them do not over tighten. If brake dust is left to settle over time this will cause damage to the finish; Remedy - it is recommended that the wheels be washed down with hot soapy water after a long drive. This is also the case if the car will stored particularly long period. RM Bolts must tighten from the front so care must be taken.