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Old 07-03-2010, 12:37 PM   #1
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Paintish stain on the road.


I know this isn't exactly about painting, but I figure the people in here can help me the most. About a year ago, the trash truck compacted in front of my house. Something in there burst and left a large reddish stain on the asphalt and then when they pulled away, it left a trail down the street. I have no idea what the substance was, but it impenetrable! I've tried thinner and my power washer, no dice. I've heard of somebody using some sort of acid to remove a stain from concrete. Anybody have any advice?

When I was in college, we wrote something on the sidewalk in ketchup, which it turns out has enough acid to stain concrete. Should I make some sort of solution with ketchup or some other acidic substance (that isn't toxic or bad for the sewer system) and scrub it and let the sun back it in?

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Old 07-03-2010, 12:39 PM   #2
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Paintish stain on the road.


Should I try to find something like this?

http://store.asphaltkingdom.com/Degr.../akdegre-5.htm

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Old 07-03-2010, 12:58 PM   #3
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Paintish stain on the road.


Flat black paint works well to.................
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Old 07-03-2010, 03:17 PM   #4
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Paintish stain on the road.


One of these should take care of it without a doubt:



I would try a bit of muriatic acid and a stiff wire brush on a small patch. Just use all the appropriate precautions.

you can use baking soda to neutralize the acid after is has done all that it can so it does not present a danger to people or the environment.
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Old 07-03-2010, 03:38 PM   #5
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Paintish stain on the road.


Quote:
Originally Posted by mark942 View Post
Flat black paint works well to.................
+1 - I agree, just paint it black, or rather grey might be better suited if the road is a few years old.
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Old 07-03-2010, 04:05 PM   #6
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Paintish stain on the road.


Quote:
Originally Posted by nap View Post
One of these should take care of it without a doubt:



I would try a bit of muriatic acid and a stiff wire brush on a small patch. Just use all the appropriate precautions.



you can use baking soda to neutralize the acid after is has done all that it can so it does not present a danger to people or the environment.
That will work just fine

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