Meguiars grit guard inserts and bucket meguiars x3003 this grit guardreg insert 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 a bucket helping to remove the dirt and leaving it safely at