Gravel guard spray for auto paint applications?

During the application, does the gravel guard start from behind the front wheel or in front of the wheelGravel guard spray for auto paint applications?
. If I'm reading your Q correctly, the wheels kick up gravel toward the rear. So it, the guard, should start behind the wheels.Gravel guard spray for auto paint applications?
behind the front wheel, since gravel is kicked to the rear during normal driving

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