Maserati GRANCABRIO Owner's Manual page 240

Normal paint maintenance consists
in washing, the frequency of which
depends on the conditions of use and
of the environment. For example, in
areas where there is high atmospheric
pollution or if travelling on roads
spread with anti-freeze salt, it is
advisable to wash the vehicle more
frequently.
WARNING: Detergents pollute water.
Therefore the vehicle should be
washed in areas equipped for the
collection and purifi cation of the
fl uids used for washing.
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For correct washing:
- wet the bodywork with a low-
pressure water jet;
- run a sponge soaked in a neutral
detergent solution over the
bodywork, remembering to rinse
the sponge frequently;
- thoroughly rinse with water and
dry with a jet of air or suede.
When drying, take particular care
with the parts that are less visible,
such as the door bays, front lid,
headlight edges, in which water can
be trapped more easily.
You are recommended not to take the
vehicle immediately into an enclosed
environment, but leave it in the
open air so as to allow the water to
evaporate.
Do not wash the vehicle after it has
been left in the sun or when the
engine compartment lid is hot: the
paint gloss could be affected.
External plastic parts must be cleaned
with the same procedure followed for
the normal washing of the vehicle.
Avoid, as far as possible, parking
the vehicle under trees; the resinous
substances that very often drop
from the trees give the paint a
dull appearance and increase the
possibility of originating corrosive
processes.
WARNING: Bird droppings must
be washed off immediately and
thoroughly, since their acidity is
particularly corrosive.
WARNING: To provide better
protection for the paint, polish the
vehicle at regular intervals, with a
suitable product leaving a protective
fi lm on the paint.
WARNING: If the vehicle is washed
using high-pressure water jets or
cleaners, it is important that the
nozzle of the jet be kept at a distance
of at least 40 cm (15.8 in) from the
bodywork to avoid damaging it.