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Bumper and spoiler, deep scratches and cracks

Bumper and spoiler, deep scratches and cracks


1. Clean the component. It is important to insure that there is no gravel or other particles in the welding area.

2. Clean the area to be repaired with Teroson FL cleaner.

3. Identify the type of plastic. See Plastic codes, temperature and welding wire or Plastic code table .

4. Select the correct welding wire and set the welding gun to an operating temperature appropriate for the plastic type. See Plastic codes, temperature and welding wire

5. If the damage is a crack, first drill at the ends so the crack does not spread. Use a 3.5 mm bit to drill a hole at each end of the crack.


6. Cut a 90° V-joint on the back. Use a low-speed machine.


7. Set the welding gun to an operating temperature appropriate for the plastic type. See


8. Weld the crack on the back.

9. Grind away any paint around the damaged area on the front.

10. Check the operating temperature of the gun.


11. Weld the front using welding wire.

12. Allow the welded area to cool.

13. Grind away excess welding material from the welded area.


14. Carry out final steps 1 - 10. See Bumper, scratches and scrapes .