Horrible Water Stain on Black Hood
Thread Starter
Newbie
Joined: Oct 2013
Posts: 5
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From: Calgary, AB
C300
Horrible Water Stain on Black Hood
The hood of my car got stained from a water leak from the ceiling of a parkade. It appears that the stain on the centre of the hood is hard to be removed. It appears that I might have rubbed off the original paint when I tried to remove the stain.
Has anybody gone through this before? Any help you can offer will be highly appreciated.
Thanks a bunch!
Has anybody gone through this before? Any help you can offer will be highly appreciated.
Thanks a bunch!
Out Of Control!!
Joined: Jun 2004
Posts: 13,799
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
Water??? That looks like there is pigment or concrete in it
It needs a polish by a pro if you've never done it before with real equipment
It needs a polish by a pro if you've never done it before with real equipment
Last edited by PeterUbers; Aug 8, 2015 at 12:11 PM.
Thread Starter
Newbie
Joined: Oct 2013
Posts: 5
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From: Calgary, AB
C300
Senior Member
Joined: Mar 2010
Posts: 290
Likes: 48
From: Florida
2013 ML350, 2019 S560
The hood of my car got stained from a water leak from the ceiling of a parkade. It appears that the stain on the centre of the hood is hard to be removed. It appears that I might have rubbed off the original paint when I tried to remove the stain.
Has anybody gone through this before? Any help you can offer will be highly appreciated.
Thanks a bunch!
Has anybody gone through this before? Any help you can offer will be highly appreciated.
Thanks a bunch!
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From: Ponte Vedra Beach FL/ Hampstead, London, England
'84 380 SL/ '02 XK8
Calcified Water Marks
Often found from parking in municipal or underground parking facilities, calcified water spots on paint and glass, water and concrete spots are pretty much the same chemically; they are consist of calcium (Ca) and magnesium (Mg) both of which are basic (alkaline pH 10) with the concrete being cross-linked with water. Often mistaken as rust spots
Correction - these can sometimes be removed by using detailer's clay to remove any hardened surface deposits
a) Apply 1:1 ratio distilled water with distilled White Vinegar (Acetic acid, pH 2) solution, and a drop or two of carwash concentrate to provide surface lubrication, Use a spray bottle to apply the solute mixture on the spots and let them "soak." Then rinse with water and repeat as necessary
b) If the ambient temperature water/vinegar mix does not work, use warm (100-120 degrees) 100% distilled White Vinegar, saturate a clean kitchen sponge with undiluted vinegar and hold the sponge over the concrete spots for a few minutes
c) If the above do not remove them try equal parts distilled water, isopropyl alcohol and distilled white vinegar plus a drop or two of carwash concentrate for surface lubrication. The acid in the vinegar will help etch and dissolve the concrete.
• Rinse the area thoroughly with water after the vinegar and then reapply wax or sealant to that area.
• To remove any surface etching use a machine polish ( Optimum Polish, Optimum Compound, Z-PC Fusion Dual Action Paint Cleaner or Swissvax Cleaner and a cutting (LC Orange or Yellow) foam pad to level the surface (use the least aggressive polish/foam pad first, if this doesn’t remove the problem step-up to a more aggressive set-up)
• Work on a very small area at a time (2-foot x 2-foot) until the polish has run out
• Repeat this process two or three times, as necessary
• If none of the above methods remove the etched water spots consider wet-sanding the paint finish
• Reapply surface protection once spots have been removed
d) RoMix Back-Set - safely removes hardened concrete from a variety of difficult to clean surfaces. It break down the ionic bond in Portland cement, releasing the cement from any surface to which it has adhered. Chemically speaking, Back-Set converts the positive ions in the hardened matrix into negative ions, which dissolves the cement into mud that can be rinsed away. Because it works chemically, rather than mechanically, Back-Set may be used to remove cured concrete, mortar, grout, and stucco from virtually any surface without harm
Often found from parking in municipal or underground parking facilities, calcified water spots on paint and glass, water and concrete spots are pretty much the same chemically; they are consist of calcium (Ca) and magnesium (Mg) both of which are basic (alkaline pH 10) with the concrete being cross-linked with water. Often mistaken as rust spots
Correction - these can sometimes be removed by using detailer's clay to remove any hardened surface deposits
a) Apply 1:1 ratio distilled water with distilled White Vinegar (Acetic acid, pH 2) solution, and a drop or two of carwash concentrate to provide surface lubrication, Use a spray bottle to apply the solute mixture on the spots and let them "soak." Then rinse with water and repeat as necessary
b) If the ambient temperature water/vinegar mix does not work, use warm (100-120 degrees) 100% distilled White Vinegar, saturate a clean kitchen sponge with undiluted vinegar and hold the sponge over the concrete spots for a few minutes
c) If the above do not remove them try equal parts distilled water, isopropyl alcohol and distilled white vinegar plus a drop or two of carwash concentrate for surface lubrication. The acid in the vinegar will help etch and dissolve the concrete.
• Rinse the area thoroughly with water after the vinegar and then reapply wax or sealant to that area.
• To remove any surface etching use a machine polish ( Optimum Polish, Optimum Compound, Z-PC Fusion Dual Action Paint Cleaner or Swissvax Cleaner and a cutting (LC Orange or Yellow) foam pad to level the surface (use the least aggressive polish/foam pad first, if this doesn’t remove the problem step-up to a more aggressive set-up)
• Work on a very small area at a time (2-foot x 2-foot) until the polish has run out
• Repeat this process two or three times, as necessary
• If none of the above methods remove the etched water spots consider wet-sanding the paint finish
• Reapply surface protection once spots have been removed
d) RoMix Back-Set - safely removes hardened concrete from a variety of difficult to clean surfaces. It break down the ionic bond in Portland cement, releasing the cement from any surface to which it has adhered. Chemically speaking, Back-Set converts the positive ions in the hardened matrix into negative ions, which dissolves the cement into mud that can be rinsed away. Because it works chemically, rather than mechanically, Back-Set may be used to remove cured concrete, mortar, grout, and stucco from virtually any surface without harm
Last edited by TOGWT; Sep 5, 2015 at 12:28 PM.
Member
Joined: Jul 2008
Posts: 88
Likes: 0
From: Maryland
E350
i had the same crap happen to my car this weekend, I used spray nine, got rid of 80% of the damage but other 20% remains, i'll play with clay bar to see if it helps... BTW is Spray Nine bad for car's clear coat anyone??? it helps with some stuborn spots.
