Forgot to mention a point of my technique - with every pass of the water blade, the next thing I do is pass my free hand along the blade (the side wiped against the car) before I make the next pass. Just a little more insurance against scratching by removing any debris picked up plus residual water drops that might fall on the car where it was just dried.
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2001 Lapis/Black/Black, PSM, Rear Speaker Kit, Optima...
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