Porsche 928 GTS 1994 Owner's Manual page 83

Caution: Do not apply silicone polishes to the
windshield or windows.
The paintwork of your car is exposed to all man-
ner of mechanical and chemical conditions, par-
ticularly climatic ones such as bright sunlight,
rain, frost and snow. Ultraviolet light, rapid
changes in temperature, rain, snow, industrial
dust and chemical deposits constantly attack the
paint which is only able to withstand such expo-
sure in the long term if it is given regular care
and attention.
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 allowed to re-
main on the paintwork. They should therefore be
removed without delay with Porsche Tar Re-
mover or Porsche Insect Remover.
Wash the affected area immediately after treat-
ing it.
84
Minor paint damage
Minor paint damage, such as scratches, scores
or chips caused by flying stones, should be
covered immediately with the Porsche Touch-up
Applicator before corrosion sets in. However, if
there are already traces of corrosion, they must
first be removed 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 protected
against chemical and mechanical influences.
As it is not possible to exclude the risk of dam-
age to this protective coating in day to day driv-
ing, it is advisable to have the underside of the
car inspected at certain intervals - preferably
before the start of winter and again in spring -
and the undersealing restored as necessary.
Your authorized Porsche dealer is familiar with
the bodyseal treatment procedures and has the
necessary equipment for applying factory ap-
proved materials. We recommend that you en-
trust 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-drumming 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 provides efficient
rust-proofing of the floor panels and com-
ponents.
WARNING
Do not apply any undersealing on or near ex-
haust manifold, exhaust pipe, catalytic con-
verter or heat shields. With the engine run-
ning, the material may overheat and ignite.
Always apply a fresh coating of suitable preserv-
ative to unprotected areas after cleaning the un-
derside of the body or the engine or carrying
out repairs to underbody components.