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Bumper and spoiler, deep scratches and cracks

Bumper and spoiler, deep scratches and cracks


1. Clean the part. It is essential that no grit or other particles remain in the area to be welded.

2. Wash the repair area with Teroson FL cleaner.

3. Identify the type of plastic. See or .

4. Select the correct welding filler and set the temperature of the welding gun so that it agrees with the type of plastic. See

5. If the damage is a crack, the ends must first be drilled so that the crack does not spread. Use a 3.5 mm drill and drill a hole at both ends of the crack.


6. Mill a 90° V-shaped groove in the reverse. Only use a low speed grinder.


7. Select the correct welding temperature on the welding gun, so that it agrees with the type of plastic. See .


8. Weld the reverse side of the crack.

9. Grind off any paint from around front of the damaged area.

10. Check the working temperature of the gun.


11. Weld the front with welding filler.

12. Allow the welded area to cool.

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


14. Perform the finishing measures 1 - 10, see