if you really want to match stone/chip guard to a 10 point concourse for want the car has this it the type of gun you would use .
this type of gun you can adjust the texture from almost flat to more then twice the texture a porsche has .
i also have the lemix chip guard gun that also works great . the key is to buy a gun that you can adjust the spray pattern and droplet size .
the lower cost none adjustable guns are pretty useless .