Strange Splash On Paintwork & Windscreen

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mls

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Hi guys,
No amount of scrubbing can get rid of these stains on my 6 week old s3.
I have only used car shampoo so far. Any ideas?

Thanks all
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You really think this is bird poo? I've had cars for 20 years and never seen this…

I will try that stuff though. Thanks
 
It looks like dried burnt on poop left on there for days in the sun.
 
A product called tardis is what I would suggest. However. You will have to reapply sealant or wax on cleaned area
 
Please don't scrub it

Few products for you to try:

Try a good tar remover like tardis or oblitarate from autofinesse
If no luck try clay and lube
If still no luck try megs scratch remover

After any of these re apply any wax or sealant
 
Try to use clay bar and lube (Mother's Clay Bar kit is pretty good) on that area. It's amazing what clay can remove.

Good luck
 
That's why I said paint.

We store H2SO4 and HCl in glass, and no etching yet... ;)
 
Whatever it is I think you've had some sound advice. I hope it comes off.

You could always contact a local detailer they should be able to professionally try and remove it.
 
steeve said:
Whatever it is I think you've had some sound advice. I hope it comes off.

You could always contact a local detailer they should be able to professionally try and remove it.
Click to expand...
I always carry Auto Glym bird wipes in the boot and wipe off straight away.:sos:
 
What you are seeing is not actual damage to the paint, so it doesn't need an abrasive solution to sort it.
This is definitely the chemicals from bird poo reacting with the water based paints that are used on cars now. The sun will have heat cycled the area of paint and the lacquer will react.

Use AG super resin polish, its not abrasive, and you will be able to remove this staining. Will need to rewax after though.
Always try and remove contaminants from paint as soon as possible.
 
hopeless said:
What you are seeing is not actual damage to the paint, so it doesn't need an abrasive solution to sort it.
This is definitely the chemicals from bird poo reacting with the water based paints that are used on cars now. The sun will have heat cycled the area of paint and the lacquer will react.

Use AG super resin polish, its not abrasive, and you will be able to remove this staining. Will need to rewax after though.
Always try and remove contaminants from paint as soon as possible.
Click to expand...

It is only the base coat that is waterbased, the clearcoat (bit on the top that is exposed to the elements (i.e. bird poo) is still solvent based as it's always been.
 
Every day is a school day. I honestly thought that clear coat could be both types but I just had to go and find out.

This from the Audi 2012 environment mag called Encounter

"With the exception of clear coat applications, all paint processes now employ water based paints that contain only a tiny proportion of solvents"

http://www.audi.com/content/dam/com...oment/audi_encounter_environment_magazine.pdf

Hopefully the advise about the AG SRP and re waxing is still ok
 
veeeight said:
That's why I said paint.

We store H2SO4 and HCl in glass, and no etching yet... ;)
Click to expand...
So what do you think should the OP use for the windscreen then. I can't think of any poo that would cause that and it makes me think whatever is on the screen and the paintwork doesn't come from an avian source...
 
We get a lot of weird stuff on cars and think its from the planes flying over head.
 
cuke2u said:
So what do you think should the OP use for the windscreen then. I can't think of any poo that would cause that and it makes me think whatever is on the screen and the paintwork doesn't come from an avian source...
Click to expand...


The correct answer is whatever the solvent is for that contaminant ;)

I would try IPA first on the glass, see how that goes.

But to be honest, without seeing it first hand its hard to suggest a correction path, so a visit to a detailer is best.
 
It might be what Jimmy is suggesting, but to jump to the conclusion it is poo when it isn't is the wrong advice. Hopefully your advice will work but it might be better if the OP gets professional advice from someone who actual sees it in the flesh because I would be concerned about the wrong advice, and I'm not judging your knowledge at all. Just making sure further paintwork damage doesn't occur.
 
Yup.

Thus my caution in trying it out on the windscreen first :)
 
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Thanks for all your responses. Turns out this is actually efflorescence!
I park in an underground car park every day, and I think when some water has leaked through the concrete onto my car it took some of the minerals with it.
A bit like stalagmites. That explains the screen staining.

I used IPA on the screen (thanks V8) and it worked a treat. I will try autoglym SRP first on the paint then try Maguiars ultimate if that doesn't work. That's the advice I got from a detailer.

Just wondering… could I also use IPA on the paint?
 
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Auto Glym super resin 'polish' is abrasive. Anything called polish is abrasive. The AG is at the bottom of the abrasive scale. The white residue left after it has dried is mainly clay. The size of the clay particles determine the level of abrasive.

For something that isn't abrasive look for a wax or as Zymol call theirs a glaze.

Have you had any luck in removing your stains? My wife had a similar problem with contaminated water seeping through the concrete of her works car park. We did manage to clean it off but it was very difficult and the lacquer did need some 'polishing' to remove the slight etching that was caused by the minerals.
 
Thanks all for your advice. Autoglym SRP worked perfectly on the first attempt!
 
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