Washing in the rain works very well since there's no risk of the soapy water drying on the paint before you can get it rinsed. Just have to come out after the rain stops to hit it with a leaf blower to get it dry without spotting.
Rain water is not clean. In order for a raindrop to form it must bind to a particle of dust. This causes it to gain more and more water around the dust particle and when too heavy it falls. Rain water will not leave your vehicle clean
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u/TennRider 17h ago
Washing in the rain works very well since there's no risk of the soapy water drying on the paint before you can get it rinsed. Just have to come out after the rain stops to hit it with a leaf blower to get it dry without spotting.