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Old 06-07-2018, 06:26 PM
tyl604's Avatar
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Join Date: Feb 2008
Location: Atlanta, GA
Posts: 3,260
How to prevent white water spots on '81 300SD

Rather than use the old thread dated 2008, I decided to start a new thread but the question is the same:

OK, guys. I spent half the day polishing out (yes polish and not compound) the water spots on the dark blue 1981 300SD. I just do not want to use aggressive compound.

Made the mistake of letting it sit out in the rain, then dry in the hot sun. Wow, white water spots all over.

So after all this time, does anyone have an answer about how to prevent this?

I realize this is on a 37 year old vehicle with original paint. That said a new black Buick Enclave was parked right next to me in the rain and then in the sun and there is not a single white water spot. What the heck????

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Old 06-08-2018, 09:30 AM
optimusprime's Avatar
Trevor Hadlington
Join Date: May 2014
Location: Worcestershire in England
Posts: 1,266

Check this if its readable .
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How to prevent white water spots on '81 300SD-e5e70e99-5ba1-48e9-83c1-a1f4a822318a.png  
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Old 06-08-2018, 09:46 AM
tyl604's Avatar
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Join Date: Feb 2008
Location: Atlanta, GA
Posts: 3,260
Thanks for that. Interesting article but 1) since I am concerned about using compound on a 37 year old paint job, I would not use sandpaper, and 2) the baking soda idea is way too weak for my damage.

What I am asking now is not how to remove (have already done that) but how to prevent new acid rain spots.

Suggestions anyone?

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Old 06-08-2018, 11:32 AM
Diseasel300's Avatar
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Join Date: May 2016
Location: Texas Hill Country
Posts: 5,083
Use polishing compound and a buffer to get the paint smooth and shiny. Follow up with a coat or two of hard-curing wax like Turtle Wax or NuFinish. Hit with a clay bar and re-wax every 6 months.

The only way to prevent etching of the paint is to protect it. About the only way to protect it is to wax it.

'11 Honda Accord EX - "The Daily" 69K
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