This video will show you how to prepare a cracked plastic auto body part for reparation.
- Heat gun
- Drill with a 1/8 bit
- Carbide bit die grinder
- Small grinder with P80 sandpaper disc
- Sander with P80/P120 sandpaper
- Clean damaged area with soap and warm water. Dry with a clean, dry cloth.
- Heat the damaged area with the heat gun to facilitate repositioning.
*Caution not to overheat.*
- Reposition the tear in order to have a level surface.
- Limit the tear by drilling 2-3mm holes with a 1/8 drill bit at each end of the tear.
- Make a V-groove along the tear using a carbide bit die grinder… on both sides.
- Using a small grinder, widen the bevel around the tear.
- Do the same step for the inside.
- Sand using a P80/P120 (bare plastic, 5cm to 8cm around the tear.
- Repeat for the inside.
- Wash with a panel prep or with a dry and clean cloth.
- For plastic soldering, apply aluminum tape to the outside and for epoxy gluing apply a regular tape.
- The tape keeps both surfaces level when manipulated.
- Now you are good to repair the bumper by plastic welding or by using epoxy.
- That’s it!
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