Mazda MX-5 2007 Bodyshop Manual page 146

11. Add the softener to the urethane primer surfacer and spray it on the repaired area.
a. Mixing method
Urethane primer surfacer + Softener ..... Mixture A
Mixture A + hardener ..... Mixture B
Dilute mixture B with thinner to spray on bumper
b. Viscosity
14—16 seconds/viscosimeter 20 °C {68 °F}
Note
• Mix the solutions at the specified ratio.
c. Spray pressure
300—400 kPa {3—4 kg/cm
d. Standard film thickness
30—40 µ
e. Spray method
Spot-spray primer surfacer on bumper three of four times
12. Air drying 20 °C {68 °F} — 8 hours minimum.
Forced drying 60 °C {140 °F} — 1 hour
13. Lightly sand the complete surface of the bumper with #400—#600 sandpaper. Do not expose the surface of the
polypropylene. (Wet or dry sanding is acceptable.)
14. Wipe the complete surface of the bumper with degreasing agent. Quickly wipe the surface with a clean rag to
degrease it.
15. Apply a matching coat of body color to the polypropylene bumper.
Note
• Be sure to use only urethane primer for a urethane bumper and polypropylene primer for a polypropylene
bumper. Other paints for repairing a polypropylene bumper are the same as those for the urethane
bumper.
16. Air drying 20 °C {68 °F} — 8 hours minimum.
Forced drying 60 °C {140 °F} — 1 hour
Note
• Let the part air dry when possible as forced drying could cause bubbles in the top coat.
End Of Sie
09-80E–8
BODY STRUCTURE [PLASTIC BODY PARTS]
Urethane primer surfacer
100
Mixture A
Mixture B
2
, 43—57 psi}
Hardner
Softener
30
4
1
YMU980PD2