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- SUBMANIAC
The car wash works perfectly fine in both games. Dirtiness in GT1 and 2 is the progressive disappearance of reflections on the car as you drive it. In GT1, you can do a couple of championships and you'll start seeing an effect, but in both games, the quickest way to build up that dirtiness is to drive on the grass for a while. In GT1 it'll take a few minutes before the car is completely matte, but in GT2, for some reason PD made it much much longer. Still will happen, but you need to drive on the grass for like 3-4x as long as GT1 to see it.
The Car Wash just restores the reflections on the car.
The Car Wash just restores the reflections on the car.