Meguiars grit guard inserts and bucket meguiars x3003b this grit guardreg insert and bucket from meguiars has been designed to deal with the prevention of vertebral scratches one of the biggest challenges in todays delicate clear coat finishes grit guard reg helps with swirl scratches at the car wash which can result from sand and small dirt particles being rubbed across the paint the grit guard reg fits nicely into the bottom of the available bucket helping to remove the dirt a