BMW 740i Owner's Manual page 152

nding upon material and type of
t (perforation of paint layer), phys-
resses from sand, road salt,
, etc., can cause corrosion to
extending beneath the finish, start-
the point of impact.
dirt, tar spots, dead insects, ani-
roppings (strong alkali effect) and
xcretions (resins and pollen) all
n substances capable of causing
ge when allowed to remain on the
of your car for any period of time
, etching, flaking, separation in
p coat).
ustrial areas, deposits of flue dust,
oily soot, precipitation containing
-dioxide (acid rain) and other envi-
ental pollutants will damage the
inish unless adequate care is pro-
– even though this is generally
d to the outside horizontal sur-
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In coastal regions, high levels of atmo-
spheric salt and humidity promote cor-
rosion.
In tropical zones, temperatures of over
1057 (406) in the shade prevail, in
addition to heavy ultraviolet radiation
and high humidity. Under those circum-
stances, light exterior finishes reach
temperatures of up to 1757 (806) and
dark finishes up to 2507 (1206).
151n