does rain water leave water spots?

[silversx]

i know it may seem like a dumb question but im just wondering



does rain water leave hard to remove water spots like tap water does??



or does it wash right out after a car wash



my guess is that it doesn't right :getdown

 

[ifoam]

acid rain can

 

[silversx]

acid rain can

is it due to mineral or the etching power of the acid.. how do you know when rain is acid rain.. is there a region? time of year??



thanks

 

[a.k.a. Patrick]

Ive had it leave stains out here in Ca.......Its not all that unusual, unfortunatley. Also take into consideration that just as a dog bathing in your bathtub can leave a ring, so could a raindrop on a dirty surface......

 

[jequirk]

Water spots are a constant battle when we are dealing with a perfect shine. :rules:

Good luck

 

[imported_steveo3002]

i find our rain spots are nothing close to tap water...which is just as well as it rains all the time here...the worst case for me is when it rains and then turns hot straight away, the rain drops will then act like a magnifying glass on the paint

 

[Accumulator]

Seems like there are three variables that matter:



The nature of the rain (very acidic, etc.); what's on the paint when the rain hits it and how it reacts to the rain (I got seriously *nasty* spotting on a car that was covered with limestone dust from a limestone-gravel parking lot); what LSP you have on the car (how much protection it provides, and maybe beading vs. sheeting too).

 

[drck1000]

Where I work, it often rains in the morning and then clears up to a hot and sunny afternoon. I've had that leave pretty stubborn water spots that I mostly notice on the glass. So far I haven't really noticed them lasting past the next wash on my paint. But for the spots on glass, I noticed that vinegar and AIO did nothing. I did have some hard water spotting that came off with vinegar.



I just assumed that the rain water contains some salts since I live in an area where you are constantly exposed to sea air. Growing up and now again living in Hawaii, I've always noticed glass spotting, especially the wiper pattern type on front windshields. When I lived in Washington, my glass didn't have water spotting, just tons of tiny pits from driving on gravelly and sandy roads :furious: .