hey man, if ur using vht nightshade, which im guessing u r, u dont even have to sand them. 600 grit is way too rough if you would anyway for a lens man. all u gotta do is mask em, clean em REALLY good with a acetone, or prepsol, then lightly rub them off with a tack rag. just spray and play after
the reason u dont gotta sand em is cuz nightshade has a built in adhesion promoter called ketone or something. so it sticks right to ur light.
mine
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