Pontiac Fiero 1988 Service Manual page 135

2C-4 BODY PANEL REPAIR
Clear C o a t
1. Lacquer Clearcoat
a. Reduce clear coat 125-150% with an
extra-slow drying lacquer thinner to the
recommended paint viscosity cup reading
of the paint manufacturer.
b. Spray two medium-wet coats of reduced
clear at 35-45 lbs. air pressure at the gun.
Allow first coat to flash completely before
applying the second coat. At least two
coats must be used. Additional coat may
be applied if desired. If additional level-
ing is desired a final coat of premixed
mist-coat material (clear acrylic and thin-
ner) can be sprayed at 20 lbs. air pressure
at the gun.
c. Allow overnight dry or longer, then, rub
out using a light-cutting hand or machine
polishing compound.
2. Enamel Clearcoat
C A U T I O N : T h e r e a r e a n u m b e r of p a i n t
s y s t e m s a v a i l a b l e for s e r v i c e u s e ; h o w -
e v e r , m a n y r e q u i r e a d d i t i v e s c o n t a i n i n g
i s o c y a n a t e s . It i s e s s e n t i a l t h a t all r e c -
. o m m e n d a t i o n s a n d w a r n i n g s l i s t e d on
t h e c o n t a i n e r l a b e l f o r m a t e r i a l s
s e l e c t e d b e f o l l o w e d .
C A U T I O N : If t h e
paint
s y s t e m s e l e c t e d
s p e c i f i e s a n a d d i t i v e c o n t a i n i n g i s o c y a -
n a t e s , it i s m a n d a t o r y t h a t a d e q u a t e
r e s p i r a t o r y p r o t e c t i o n b e w o r n . A n
e x a m p l e of s u c h p r o t e c t i o n i s a n air Sine
respirator w i t h a full h o o d or half m a s k .
If n o t a v a i l a b l e , u s e a v a p o r / p a r t i c u l a t e
r e s p i r a t o r t h a t t h e r e s p i r a t o r s u p p l i e r
r e c o m m e n d s a s effective for i s o c y a n a t e
v a p o r s a n d m i s t s ( u n l e s s local r e g u l a -
t i o n s prevail).
S u c h p r o t e c t i o n s h o u l d b e w o r n d u r i n g
t h e e n t i r e p a i n t i n g p r o c e s s . P e r s o n s
w i t h r e s p i r a t o r y p r o b l e m s , o r t h o s e
a l l e r g i c t o i s o c y a n a t e s m u s t n o t b e
e x p o s e d t o i s o c y a n a t e v a p o r s or s p r a y
m i s t .
a. Following paint manufacturers label
directions, activate the Polyurethane
Enamel Clear Coat material. Mix material
thoroughly. Pot life of activated mixture
is approximately eight (8) hours.
b. Some activated Polyurethane Enamel
Clear Coat materials are ready to spray as
packaged under normal conditions. As
conditions vary, to enhance flow out and
leveling, up to 10% more than the speci-
fied enamel reducer may be added to the
activated clear coat mixture. Check the
viscosity of the activated mixture with a
Zahn # 2 paint viscosity cup or its equiva-
lent. Follow the paint manufacturer's
label recommendations for paint viscosity
cup reading.
c. Spray two medium coats of activated clear
coat material at 50 lbs. air pressure at the
gun over entire area(s) to be refinished.
For panel repair, allow 15-20 minutes dry
time between coats. For overall refinish-
ing, apply first coat, allow to flash, then
apply second coat. Spraying medium-wet
coats of clear coat material to reduce sur-
face texture (orange peel) and provide
optimum appearance. Allow to cure over-
night.
F L E X I B L E P A N E L PAINT REPAIR SYSTEM
Flexible panels are the bumpers, lower rear
quarter, and doors.
Important
Full panel repairs must be performed. Partial
(spot) repairs are not recommended.
C A U T I O N : T h e r e a r e a
number
of flexi-
ble paint s y s t e m s a v a i l a b l e for s e r v i c e
u s e ; h o w e v e r , m a n y require a d d i t i v e s
c o n t a i n i n g i s o c y a n a t e s . It i s e s s e n t i a l
t h a t all r e c o m m e n d a t i o n s a n d w a r n i n g s
listed o n t h e c o n t a i n e r label for m a t e -
rials s e l e c t e d b e f o l l o w e d .
C A U T I O N : If t h e paint s y s t e m s e l e c t e d
s p e c i f i e s a n additive c o n t a i n i n g i s o c y a -
n a t e s , it i s m a n d a t o r y t h a t a d e q u a t e
r e s p i r a t o r y p r o t e c t i o n b e w o r n . A n
e x a m p l e of s u c h p r o t e c t i o n i s a n air line
r e s p i r a t o r w i t h a full h o o d or half m a s k .
If n o t a v a i l a b l e , u s e a v a p o r / p a r t i c u l a t e
r e s p i r a t o r t h a t t h e r e s p i r a t o r s u p p l i e r
r e c o m m e n d s a s effective for i s o c y a n a t e
v a p o r s a n d m i s t s ( u n l e s s local r e g u l a -
t i o n s prevail).
S u c h p r o t e c t i o n s h o u l d b e w o r n d u r -
i n g t h e e n t i r e p a i n t i n g p r o c e s s . P e r -
s o n s w i t h r e s p i r a t o r y p r o b l e m s , o r
t h o s e a l l e r g i c t o i s o c y a n a t e s m u s t n o t
b e e x p o s e d t o i s o c y a n a t e v a p o r s o r
s p r a y m i s t .
Flexible Undercoat R e q u i r e m e n t s
' If the part to be painted is a replacement, it will
be factory primed with an elastomeric enamel-based
primer. As long as the original primer is not scratched
exposing the plastic substrate, all that is required is to
solvent clean, sand with #400 paper or a red "Scotch-
Brite" pad, reclean and apply elastomeric color.
However, if the plastic substrate is exposed or
the part is repaired with flexible filler material, a flex-
ible primer-surfacer must be used to provide the fill-
ing properties required. This is to prevent a "bulls-
eye" condition or highlighting of the bare substrate or
filler repair after color is applied.
Prepare flexible primer-surfacer as follows:
1. Clean the entire part with a wax, grease and
silicone removing solvent applied with a water
dampened cloth. Wipe dry.