Porsche 928 ST1991 Owner's Manual page 79

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The paintwork of your car is exposed to all
manner of mechanical and chemical condi-
tions, particularly climatic ones such as
bright sunlight, rain, frost and snow. Ul-
traviolet light, rapid changes in temperature,
rain, snow, industrial dust and chemical de-
posits constantly attack the paint which is
only able to withstand such exposure in the
long term if it is given regular care and atten-
tion.
Black matte finished parts should not be
treated with preservatives or polishes as this
will spoil the matte effect.
Spots and stains
Tar stains, grease, oil spots and dead insects
cannot always be removed by washing
alone. They can cause discoloration if al-
lowed to remain on the paintwork. They
should therefore be removed without delay
with Porsche Tar Remover or Porsche Insect
Remover.
Wash the affected area immediately after
treating it.
Minor paint damage
Minor paint damage, such as scratches,
scores or chips caused by flying stones,
should be covered immediately with the
78
Porsche Touch-up Applicator before corro-
sion sets in. However, if there are already
traces of corrosion, they must first be re-
moved carefully and thoroughly. Coat the
area with a rust-proofing primer and finish
off with a top coat. The paint code and color
number are found on the vehicle's paint data
plate.
Undersealing
The underside of your car is durably pro-
tected against chemical and mechanical in-
fluences.
As it is not possible to exclude the risk of
damage to this protective coating in day to
day driving, it is advisable to have the under-
side of the car inspected at certain intervals
- preferably before the start of winter and
again in spring - and the undersealing re-
stored as necessary.
Your authorized Porsche dealer is familiar
with the bodyseal treatment procedures and
has the necessary equipment for applying
factory approved materials. We recommend
that you entrust him with all such work and
inspections.
Unlike conventional spray oils, undersealing
and rust-proofing compounds based on
bitumen or wax do not attack the anti-drum-
ming materials applied at the factory.
Before applying fresh underseal, carefully re-
move deposits of dirt and grease. Once it
has dried, the new undersealing compound
forms a tough protective coating which pro-
vides efficient rust-proofing of the floor
panels and components.
WARNING
Do not apply any undersealing on or near
exhaust manifold, exhaust pipe, catalytic
converter or heat shields. With the engine
running, the material may overheat and ig-
nite.
Always apply a fresh coating of suitable pre-
servative to unprotected areas after clean-
ing the underside of the body or the engine
or carrying out repairs to underbody compo-
nents.
Light lenses and plastics
Use only soap and water solution for clean-
ing the plastic light lenses. Never use chem-
ical cleaning agents for this purpose. The
same applies to other plastic parts and plas-
tic films.

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