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2 C 4
1977 PONTIAC SERVICE MANUAL
6. Let the mixture set for approximately 5 minutes.
7. Place a length of masking tape under each side of the
cut-away area, so that when folded back it will cover the area.
8. Fill the damaged area slightly above the area being
repaired to allow for sanding. Cover
fill
area with tape. Deep
holes should be filled in stages to avoid gassing or air
entrapment. The patch will air-dry to a sanding state in
approximately one (1) hour (Curing may be accelerated by
careful exposure to heat.).
C AUTI 0 N: Too-early removal of tape from filled
area could possibly tear the patching material.
9. Wet-sand the cured patch level with adjacent areas.
If holes appear in patch area, repeat filling procedure.
10. If pitting occurs, fill pits by rubbing patch surface
with Endura Surfacer GM
#
1050834 or equivalent.
11. Endura Surfacer should be applied in light, even
coats. Allow to dry 15-20 minutes. Sand, using #W-grit
paper (This step may have to be repeated several times to
minimize the possibility of highlighting the repaired area.).
12. Wet-sand the entire bumper or panel with
#
150-grit
sandpaper.
D. Coloring Procedure:
1. THOROUGHLY CLEAN the entire surface area,
with 39193 Prepsol (Dupont) or equivalent solvent, to insure
a surface free of contamination.
2. To promote paint adhesion and insure a smooth
surface, a light scuff-sanding with #W-grit sandpaper (wet
or dry) is recommended.
3. Repeat cleaning of the surface.
NOTE: Under no circumstances should acrylic lacquer
paint be used in refinishing urethane or P.V.C. materials.
Although the finish may appear satisfactory, it will crack
from physical contact.
4. Mask off areas of car not to be painted using masking
tape and paper.
5. Thoroughly mix four (4) parts color coat with one (1)
part hardener and four (4) parts acrylic lacquer thinner
(follow label directions).
NOTE: Mix only what is needed, noting that pot life is
2-3 hours.
CAUTION: Because o f the isocyanates contained
in the hardener, it is mandatory that a Wihon
Paint Spray Respirator or equivalent respirator
be
worn during the entire painting process. Also, read
entire label on hardener container before spraying
as persons with respiratory problems or those
allergic to isocyanates must not be exposed to the
isocyanate vapors or spray mist.
6. Using 35 lbs. of pressure at the gun, spray panel with
2 or 3 coats (depending on the need) allowing 2-3 minutes
flash time between each coat.
NOTE: Use a final mist coat for metallics.
7. Allow paint to cure 2-4 hours before handling.
8. COMPOUNDING reduces the gloss. For this reason
rubbing compound should be used only if
a
reduction of
gloss is desired.
II. PAINTING PRIMED SERVICE
REPLACEMENT URETHANE BUMPERS/
HEADLAMP MOUNTING PANELS &
COLORED PLASTIC BUMPER CLOSE-
OUT PANELS
Follow Steps 1 thru 8 of Section I-D "Coloring
Procedure".
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