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Water Damage from Car Cover


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#1 prowlinpassion

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Posted 18 July 2006 - 05:14 AM

Hi,
I have a 99 Purple Prowler which is left outsde with an Evolution 4 car cover and with a tarp over the cover. I took both off only to discover a large stain, milky-colored (about the 15" diameter)on the hood. I brought to a detailer who attempted to buff it out, without luck. I then brought it to a body shop, who has rarely seen this, but talked about the stain baking through and possibly attacking the clear coat, and would need to refinish the hood. Any ideas on commercially available cleaners I can try before going through this hassle and expense? Any suggestions are welcome! Here is the url for the pictures:

http://i89.photobuck...on/IMG_1221.jpg

http://i89.photobuck...on/IMG_1220.jpg

http://i89.photobuck...on/IMG_1219.jpg
Thanks,
Ron

#2 Setec Astronomy

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Posted 18 July 2006 - 05:38 AM

It would really help if you had some pictures. Can you feel the stain? Is is raised, lowered, rougher than the un-stained area? Also, the Evolution covers are breathable, if the tarp you had on top was not, that is probably not the best practice. Some members here use combinations of two car covers, with both I believe being breathable, perhaps they will chime in (Bill D, where are you?).
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#3 prowlinpassion

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Posted 18 July 2006 - 09:44 AM

Hi Mike,
Thanks for the reply. My pics are to 'large' to attach. If I can send them to via e-mail I would be happy to. Please send me your e-mail. Appreciate your help.
Best,
Ron

#4 tom p.

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Posted 18 July 2006 - 10:06 AM

I've seen this exact condition previously. It appears the moisture has somehow permanently damaged the paint. I thought it would go away but I saw the car several months later (he ceased using the car cover) but the white "cloud" was still there, pretty much unchanged.

(This is one of the reasons I'd NEVER use a car cover on a car kept outside.)

#5 Coupe

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Posted 18 July 2006 - 10:10 AM

The reason this happened is becuase you put a tarp over the car cover. The car cover needs to breath and by putting the tarp over it it could not breath. Its not the car covers fault, its the tarps fault.

#6 Setec Astronomy

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Posted 18 July 2006 - 01:52 PM

Prowlin, there are many photo tools which would allow you to resize those photos so they are small enough to post, then everyone can see them.
New & Improved! "Truly filled with inconceivable hatred" --South Florida Review
What little I know about detailing I learned from David Fermani.

#7 Anthony Orosco

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Posted 18 July 2006 - 01:58 PM

Many times placing the car out in the sun will evaporate the moisture. Clear coats will absorb a rather large amount of water and also release it BUT as noted because air was not allowed to circulate because of the tarp it may be beyond coventional repair.

Rubbing alcohol can aide in evaporation but let it sit in the sun for a day and see what happens. Re-paint might be the only solution if not.

Anthony
"The Art & Science Of Auto Detail"

#8 tom p.

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Posted 18 July 2006 - 02:04 PM

Yuk, that's bad. Identical to what I witnessed on my friend's car.

#9 foxtrapper

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Posted 19 July 2006 - 04:42 AM

Permanent damage. Just like what people get under their vinyl bras when they leave them on for months on end in areas that see rain.

It will improve some baked out in the sun for a few weeks. But the only real fix is a repaint.

#10 Lou K

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Posted 02 April 2010 - 07:42 AM

Hi,
I have a 99 Purple Prowler which is left outsde with an Evolution 4 car cover and with a tarp over the cover. I took both off only to discover a large stain, milky-colored (about the 15" diameter)on the hood. I brought to a detailer who attempted to buff it out, without luck. I then brought it to a body shop, who has rarely seen this, but talked about the stain baking through and possibly attacking the clear coat, and would need to refinish the hood. Any ideas on commercially available cleaners I can try before going through this hassle and expense? Any suggestions are welcome! Here is the url for the pictures:

http://i89.photobuck...on/IMG_1221.jpg

http://i89.photobuck...on/IMG_1220.jpg

http://i89.photobuck...on/IMG_1219.jpg
Thanks,
Ron


I had the same thing happen a number of years ago but not the same circumstances that you encountered. I tried a number of steps to get the moisture out ofthe clear to no avail. The clear coat will absorb moisture and the only cure is to repaint.
Lou K

#11 mikeross

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Posted 09 May 2010 - 05:35 AM

my car covers did the same thing to my car. I did not know back then that these could actually do damage to my car's paint.

#12 KC's

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Posted 05 January 2011 - 12:47 AM

my car covers did the same thing to my car. I did not know back then that these could actually do damage to my car's paint.


now that we know, we really need to avoid them

#13 gatesab

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Posted 08 August 2011 - 04:48 AM

its not big deal... i think you should visit gates auto

#14 Bill D

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Posted 08 August 2011 - 05:10 AM

I'm not up on the latest in the technology of car cover fabrics but at the time when I got mine, I was parking outside fairly often and so I opted for *two* custom covers--a Weathershield on top of a Noah--overkill yes, but water never got through, let alone residual marks on the paint. I still have them, but I'm betting there's one type of fabric now that completely blocks out the elements while still breathable and doesn't allow residue on the paint.
Unsuccessful at converting my neighbors to Autopians :sadpace:


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#15 V3AutoDetailing

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Posted 08 August 2011 - 09:39 AM

I would blame this on the tarp. If your car cover is made to breath, the tarp it would allow that to happen. The tarp kept the moistre in cuasing the damage. Looks like your going to need a repaint.

#16 Ron Ketcham

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Posted 08 August 2011 - 10:47 AM

Ok, I am late getting here.
Listen to Anthony,but one or two little differences.
Over the years of the use of transit wrap by vehicle manufacturers, there have been thousands of hoods, tops, fenders repainted due to moisture entrapment showing after the removal of the plastic transit wrap.
In most, and I mean "MOST" cases, the repainting was not necessary.
But the sub contractors at the ports sure liked the additional income.
Here is what they now do when this concern is observed.
1. Wipe affected area with rubbing alcohol (70, 90% what ever) and make sure the area is "wet" with the alcohol.
2. Alcohol (IPA only in this case) is a "drying agent" which is why it is used.
3. While wet, using a heat gun or even a hair dryer,start evenly heating the affected area, but do not allow the skin temperature of the painted surface to exceed 175 F.
4. Move the heat and air source, evenly over the affected area, starting at one edge, working your way across the area.
5. Observe if the "cloud" is going away.
6. A second application and heating may be required.

If this does not remove the entrapped moisture from the clear, and you should wait a couple of hot sunny days to make sure, then refinishing is the only option.

This process has been done on thousands of new vehicles at ports across the world, as a less expensive method to relieve entrapped moisture, so it's nothing new.

Grumpy

#17 Picus

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Posted 08 August 2011 - 01:38 PM

This thread is hilariously old, but fwiw I have dealt with this a couple times, all using a similar process ^^ (to Rons). One thing I would add is not to seal/wax the effected section (even if the cloud is gone) for a week or two. I've seen the cloud disappear then re-appear a few days later after sealing/waxing.
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#18 V3AutoDetailing

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Posted 08 August 2011 - 02:33 PM

WOW, just looked at the dates. Haha. Some good information none the less.
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#19 MSOsr

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Posted 08 August 2011 - 03:16 PM

I think back when this thread started car covers were made of canvas!

I cover my car with an Evolution 4 cover for the 2 weeks we spend at the beach. Failing to cover your car when down there is suicide for your paint; after a couple of days, you can't even see through the windshield if your car isn't covered.

Mike (hates paying the big bucks for a cover that's used 2 weeks per year, but my car deserves it)

#20 Ron Ketcham

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Posted 08 August 2011 - 05:18 PM

You got that right, it takes some time for the entrapped moisture to truly leave the substarte.
Good follow up on the process.
Seems that everyone wants immediate results and that is not always possible when dealing with the chemistry of paint.

This thread is hilariously old, but fwiw I have dealt with this a couple times, all using a similar process ^^ (to Rons). One thing I would add is not to seal/wax the effected section (even if the cloud is gone) for a week or two. I've seen the cloud disappear then re-appear a few days later after sealing/waxing.






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