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220 Car care
Two-coat enamel
As the name implies, two-coat enamel is
applied in two operations. The first coat, the
base color, contains the pigment, metal
flakes and binder. The second coat consists
of a clear enamel, which provides the final
gloss for the paintwork and protects the
base from moisture and environmental con-
taminants.
Touch-up stone-chip damage as follows:
1 Thoroughly clean the damaged area.
2 Then apply the primer, base colour and
finally, the clear enamel. To achieve the
best finish, apply two or three coats of
primer.
Anti-corrosion
treatment
The entire car undergoes a series of anti-
corrosion processes during production.
These include electrophoretic priming,
polyester-based coating to protect against
stone chip damage and corrosion, and
treatment of body cavities and members
with thin, penetrating rustproofing oil.
In addition, most body panels, such as the
hood, doors and floor pan are galvanized.
The anti-corrosion treatment on some parts
of the car is constantly exposed to wear and
prone to damage. This applies particularly
to the underside of the car and inside the
wheel arches, where grit, road salt and the
like that are thrown up can give rise to cor-
rosion where the underseal has worn away.
The extent of this obviously depends on the
conditions in which the car is used.
Accordingly, make it a habit to hose the
underside of the car often and to inspect the
condition of the underseal. The anti-corro-
sion warranty does not relieve the car owner
of the need to carry out normal maintenance
to the rustproofing and to make good any
damage.
Surface treatment composition
1 Body panel
2 Zinc (certain components only) 7.5 µm
3 Phosphate coating 3 –5 µm
4 Cathodic ED 30 µm
5 Intermediate coat 40 –45 µm
6 Metallic base/solid base 13 µm
7 Clear enamel 45 µm