A
A
I
I
R
R
P
P
L
L
A
A
N
N
E
E
T
T
E
E
C
C
H
H
N
N
I
I
C
C
A
A
L
L
D
D
E
E
S
S
C
C
R
R
I
I
P
P
T
T
I
I
O
O
N
N
,
,
O
O
P
P
E
E
R
R
A
A
T
T
I
I
N
N
G
G
,
,
M
M
A
A
I
I
N
N
T
T
E
E
N
N
A
A
N
N
C
C
E
E
A
A
N
N
D
D
R
R
E
E
P
P
A
A
I
I
R
R
M
M
A
A
N
N
U
U
A
A
L
L
5-13
Document No.:
EV97SLNOEN
Date of Issue:
02/2008
Revision:
-
type of
colour
manufacturer
name
type
other items
surface
weight
[g/µm/m2]
recommended
thickness
[µm]
drying
time
(beween
spray-
coats /
total) /20°C
base colour
coat:
BASF
Glasurit R-55/
shade
(base)
acrylic-
polyure
tan
BASF
Glasurit
352-216
(thinner, long)
1.2-1.4
(by shade)
15-20
10 min / 20
min
Double-
coat
top coat,
bright::
BASF
Glasurit
923-155
(base)
acrylic-
polyure
than
BASF
Glasurit 929-73
(standard
hardener)
Glasurit 352-91
(standard
thinner)
0.92
30-40
5 min / 5
hrs
5.6.3 Small damage
5.6.3.1 General
Small damage is a deterioration of corrosion resistance. At repair the situation is made more
difficult by the fact that the substrate for repair coats is not a compact surface of basic material
but mostly all coats of surface protection (after grinding), of which not all are suitable for (in ageing
stage) for good adhesion of paint coats. Therefore we recommend to carry out such repairs by a
verified system.
Before repairing it is necessary to differentiate the type of the existing top coat, single coat and
two-coat (with the top coat). For repair it is necessary to follow the used type of colour.
It is suitable to choose the delimited area (e.g. connection of sheets, wing edge) for the scope of
the place which is being repaired transition is then better blended. In the case that it is not possible
to choose the area in this way, it is necessary to take into consideration the higher difficulty of the
procedure as for the uniformity of shade and elaboration of coat transition.
5.6.3.2 Grinding
For good adhesion of the repair coats it is necessary to carry out grinding of the old paint coat at
least up to such depth as the depth of damage. With two-coat type of the top coat it is necessary
to add at least 50 mm (2 in) for the run-out of the top coat. Grinding can be started with abrasive
having grain size of max. 160 and to finish with grain size of 400. It is made by the grinding
equipment with the suction from the area of grinding or by manual grinding under water.
CAUTION
Anodized coat must not be destroyed by grinding on the Al-alloy sheet.
5.6.3.3 Degreasing
It is carried out in the same way as in the case of the total spray coat - see para 5.6.2.1