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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 25 (Exterior Trim & Interior Trim) >> 7. Front Bumper >> C: Polypropylene Bumper Repair >> 1. Coating Method For Pp Bumper

1. Coating Method For Pp Bumper

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Process No. Process name Job contents
1 Bumper installation Place the bumper on a paint worktable as required. Use the paint worktable conforming to inner shape of bumper if possible.
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2 Masking Mask specified part (black base) with masking tape. Use masking tape for PP.
3 Degreasing/cleaning Clean all parts to be painted with white gasoline, normal alcohol, etc. to remove dirt, oil, fat, etc.
4 Primer paint Apply primer to all parts to be painted, using spray gun. Use primer (clear).
5 Drying Dry at normal temperature [10 to 15 min. at 20°C (68°F)].
In half-dried condition, PP primer paint is dissolved by solvent, e.g. thinner, etc.
Therefore, if dust or dirt must be removed, use ordinary alcohol etc.
6 Top coat paint (I) Non-colored Metallic paint
Use section (block) paint for top coat.
For paint/hardener mixture, observe the specifications recommended by the manufacturers.
  • Viscosity: 10 - 13 sec./20°C (68°F)
  • Film thickness: 35 - 45 μ
  • Spraying pressure: 245 - 343 kPa (2.5 - 3.5 kgf/cm2 , 36 - 50 psi)
Use section (block) paint for top coat.
For paint/hardener mixture, observe the specifications recommended by the manufacturers.
  • Viscosity: 10 - 13 sec./20°C (68°F)
  • Film thickness: 15 - 20 μ
  • Spraying pressure: 245 - 343 kPa (2.5 - 3.5 kgf/cm2 , 36 - 50 psi)
7 Drying Not required. Dry at normal temperature [at least 10 min. at 20°C (68°F)].
In half-dried condition, avoid dust, dirt.
8 Top coat paint (II) Not required. Apply a clear coat to parts with top coat paint (I), three times at 5 - 7 minute intervals.
For paint/hardener mixture, observe the specifications recommended by the manufacturers.
  • Viscosity: 14 - 16 sec./20°C (68°F)
  • Film thickness: 25 - 30 μ
  • Spraying pressure: 245 - 343 kPa (2.5 - 3.5 kgf/cm2 , 36 - 50 psi)
9 Drying 60°C (140°F), 60 min. or 80°C (176°F), 30 min.
If the temperature is higher than 80°C (176°F), PP may be deformed. Keep maximum temperature at 80°C (176°F) or less.
10 Inspection Check paint.
11 Removal of masking Remove the masking tape applied in procedure 2.