Corn oil will work to loosen the spores from car finishes. It can be applied
using a soft nylon pad, like the "Dobie" Brand (but avoid such pads that will
scratch the surface, e.g., Scrunge Pad). Wash it off immediately with soap and
hose water after removing the spores. It takes a bit of rubbing, but it will
loosen. Do not apply in direct sun as the oil will cook to the surface,
especially on hot summer days. Remove the corn oil immediately lest it cake to
the car finish. By no means, let it sit overnight. Polish the car thereafter to
restore an even finish and remove any residual oil.
The spots are on our cars. My husband spent over 2 hours this past weekend
picking the spots off of my car. What a mess!!
I run an automotive web site and have had personal experience with artillery
fungus. I did a quick write up on my blog to let people know what I have done to
remove these pesky spores, thought it might be of interest to you. Go to my blog
I have it and my daughter's car was covered in it. I took it to a local
detail shop and they used white vinegar to remove it from the car.
Car wax worked in the removal from my car (safely) with a little elbow
On my new truck, I used 'Turtle Wax Spray Bug & Tar and Tree Sap
Remover'. I sprayed it on the spots (in small sections) and let it soak in for a
few seconds. I then rubbed the spots with pieces of an old soft towel,
occasionally using my finger nail thru the towel. In about 4 hours I got all of
the spots off, probably because the spots were 2 days old or less.
... I found the following product to work the best in the area of removing
the stain left on a vehicle surface once the sticky portion has been removed: Meguiars-Smooth
Surface Clay Kit ...the entire vehicle will need to be done to ensure an
even appearance otherwise you'll end up with glossy spots in the treated
To remove from cars or travel trailers. I have had great success by first
scraping them very carefully with a plastic scraper and then simply removing the
stain with a "Magic Eraser".
I happen to detail cars and have found these little spots, that I now know
to be fungus (thank you) to be rather annoying. I use my thumb nail to remove
the majority of the spores. A little residue is left behind which comes off
easily with wax, once you break the hard outer shell. A Mr. Clean Magic Eraser
will also work if you are not waxing the car, after you scrape off the outer
shell. Just be careful, as Magic Erasers can damage paint if rubbed too much.
If these spores are not removed quickly, they become rock hard and will be very
difficult to remove.
Dr. Davis, I would not suggest using a magic eraser on a car surface. I
just got finished doing this and it left scratch marks which then had to be
fixed with a scratch remover and then waxed.