its raining here in so cal ..



my question is rain water considered "hard water" ?? will it leave water stains that etch into the paint due to minerals??



i know acid rain can etch.. but im talking about just normal rain i suppose... if i leave rain water on my car for a week.. will it etch and leave a "ring" like tap water would???



will rain spots just be washed right off at the next wash??



thanks