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Old 03-06-2021, 10:48 PM   #1
minibbb
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Horrendous water marks on black paint- any solution other than polishing?

Evening all

I spent a day treating my Mercedes GLC to CarPro Essence and Reload a couple of weeks back and it looked super.

In the mean time I had the odd bird poo on it so gave it a blast with the hose to stop it etching....

It looks like instead I have caused horrendous water marks. The whole bonnet and wings are covered! Paint even feels rough to the touch.

I re-applied reload hoping this would take care of them (daft maybe?!) but it didn't. Time was getting on and mindful of noise at 2030hrs I gave the bonnet a quick hit with the DA and essence - two sets later on one section that part was sorted.

It now means re doing all of the effected areas of the car.

I had no idea how bad water marks could be and that simply washing it again wouldn't resolve it. Am I likely to get this issue again from rain alone or is it simply hard tap water to blame? If so should I get a filter on my outside tap?

Any other products other than machining that will get rid of the marks?

Can't be machine polishing it every time as I'll have no clear coat left ha!



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Old 03-06-2021, 10:53 PM   #2
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CarPro Spotless or Kamikaze waterspots remover. May remove Reload also. If spots don’t come out then unfortunately you’ll need to re-polish.


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Old 03-06-2021, 10:55 PM   #3
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If i have any water spots around the car i use Koch chemie fse, depends on how baked on the water spots are though

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Old 03-06-2021, 10:56 PM   #4
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Am I likely to get this issue again from rain alone or is it simply hard tap water to blame?

The latter..

If so should I get a filter on my outside tap?

A DI Vessel is a useful tool in these scenarios for sure.
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Old 03-06-2021, 11:32 PM   #5
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Thanks all that's really handy I'll have a look at those products and be more careful in the future!

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Old 05-06-2021, 11:00 PM   #6
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Quote:
Originally Posted by minibbb View Post
Thanks all that's really handy I'll have a look at those products and be more careful in the future!

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'Optimum no rinse' is what I use in between washes to remove bird poo, a spray bottle mixed up and either spray and cover with a MF or kitchen roll till it softens and then remove with care, I have a adjustable trigger that has mist/spray and can usually get most off without touching it on 'spray' and then dab dry the remaining wet areas when it runs down the panel will prevent them getting swirled. Also the mix doesn't tend to water spot here being polymer based, although I'm in a relatively soft water area. even if you see it dry can spray more on and wipe and the spots are gone (could be the area i'm in though)

Haven't used it but labocosmetica energo looks impressive on water spots
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Old 07-06-2021, 07:39 AM   #7
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i used to get this issue but then i bought a water filter which i fit between my tap and the pressure washer for the final rinse.Works a treat.
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Old 07-06-2021, 12:32 PM   #8
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Koch chemie FSE is great product and reasonable price for 1L, works well on water marks however if the deposits are etched into the clearcoat it may take compounding or even wet sanding to remove marks depending on how bad they are
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