You've probably got mostly organic carbon particles (the main pollutant from
that kind of a burning source) in your "black rain" but it could have
scavenged some nitrates and sulfates (more from cars, utilities, et.al.)
that were in the air too. Nitrate and sulfate particles can be fairly
hygroscopic so they will absorb moisture out of the air as they sit on your
car. I'd rinse it off as soon as possible as it could be/become a bit
acidic.
Use a gentle flow of water to move the particles off the paint surfaces and
then use a wash glove to get any thing that is left. Don't start right in
with the wash glove or you'll be grinding those particles into your paint
and creating micro scratches (swirls) that are very hard to get rid of.
Bud Rolofson
71TR6 CC57365 (Good 6)
66TR4A CTC57806 (The Wreck-Almost Parts)
66TR4A CTC57529 (The Project)
----- Original Message -----
From: "Michael Gajic" <michaelgajic@hotmail.com>
To: <triumphs@autox.team.net>
Sent: Sunday, December 30, 2001 9:19 PM
Subject: Acid Rain???
> Listers,
>
> The air in Sydney is thick with smoke from the bush fires. It rained for a
> moment over my place today. The rain was heavy with black particles from
the
> fires. Any ideas on whether this black rain would be damaging to my TR4's
> paint?
>
> Many thanks in advance,
> Michael
> 63' TR4
> Sydney, Australia
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