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Old 11-29-2013, 02:17 PM
 
Location: New Haven, CT
1,030 posts, read 4,275,702 times
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Whenever I see a car that has been parked for a couple of months, I always see this. Green Algae or some kind of algae will form around the gas door.

Ive seen it on a few cars throughout the years. I just notice it always seems to start around the gas door.


Anyone see this or know why it happens?
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Old 11-29-2013, 05:47 PM
 
Location: East of Seattle since 1992, 615' Elevation, Zone 8b - originally from SF Bay Area
44,550 posts, read 81,103,317 times
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Here in the Northwest it's in an around the gas door, but also along the trim and rubber seals around the windows, and every crease and crevice along the body. It's moss. Normally regular washing and an occasional extra effort with a toothbrush takes care of it.
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Old 11-29-2013, 07:31 PM
 
19,014 posts, read 27,569,699 times
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50/50 Clorox/water. Even vinegar.
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Old 11-30-2013, 07:19 AM
 
Location: New Jersey
334 posts, read 716,229 times
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Quote:
Originally Posted by NewHavensFinest View Post
Whenever I see a car that has been parked for a couple of months, I always see this. Green Algae or some kind of algae will form around the gas door.

Ive seen it on a few cars throughout the years. I just notice it always seems to start around the gas door.


Anyone see this or know why it happens?
Best guess is that water collects there. Next time you see it check to see if that side of the car is facing North.
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Old 12-02-2013, 07:04 AM
 
Location: Connecticut
470 posts, read 1,664,413 times
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It's moss/mildew. It's caused by not washing that area of the car (like if you didnt clean your bathtub). You can get rid of easily by just washing with car soap and water. It is common around trunks and insides of doors becasue most people can't be bothered to clean those areas.
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Old 12-02-2013, 03:21 PM
 
Location: New Haven, CT
1,030 posts, read 4,275,702 times
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Thanks for the response guys. Maybe I shouldve phrased my question a little differently.


It always forms around the gas door. I was wondering if it's the dried gas residue on the paint, that moss attaches to pretty fast... Or if its the gas actually taking layers off the paint and making the paint more porous and has better adhesion than the surrounding areas..

Get what Im trying to say?
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Old 12-02-2013, 11:04 PM
 
Location: Sarasota FL
6,864 posts, read 12,071,773 times
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Could be residue from the Andromeda Strain. Keep a safe distance if it has an iridescent glow. It is known to grow in porous surfaces.
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Old 12-03-2013, 05:44 AM
 
Location: Connecticut
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The reason you don't see it on other parts of the car is because you have a clear coat covered in multiple layers of wax. Around the gas door, many older cars don't have much of a clear coat left. Add on top of that the fact that no one waxes inside the fuel door and you do get a more porous paint. Yes, the fuel can add to it of you spill it, but it wont affect it much.

Most of what you see is mildew growing in a dark, damp environment.
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