Plastic and Composite Repair

One-sided damage to a polypropylene bumper cover may require all of these EXCEPT:

• an adhesion promotor

• a repair taper

• a filler material

• reinforcement tape

After sanding the filler during a one-sided SMC fender repair, the repair area should be:

• cleaned with a vacuum

• cleaned with solvent-based cleaner

• washed with soap and water

• coated with an adhesion promoter

Technician A says that conventional fiberglass repair material can be used to repair SMC.

Technician B says that pinning is used to strengthen repairs to fiber-reinforced plastic.

Who is right?

• A only

• B only

• Both A and B

• Neither A or B

Technician A says that backside plastic repair adhesive may sand easier than front side repair material.

Technician B says that some plastic repair adhesives may be used as plastic repair fillers.

Who is right?

• A only

• B only

• Both A and B

• Neither A or B

Technician A says that flexible-polyester filler designed for plastics may be used to repair minor imperfections and scratches.

Technician B says that flexible polyester filler designed for plastics may be used as an adhesive on the backside.

Who is right?

• A only

• B only

• Both A and B

• Neither A or B

All of these may cause adhesion problems with a polyolefin part EXCEPT:

• applying heavy coats of adhesion promoter

• using a solvent-based cleaner

• using aluminum tape to align the repair

• smearing the plastic when making a repair taper

Technician A says that cleaning the melt tube on an airless welder helps ensure the weld is not contaminated.

Technician B says that cleaning the shoe on an airless welder helps ensure that the heat setting is accurate.

Who is right?

• A only

• B only

• Both A and B

• Neither A or B

Technician A says that body fillers designed for metal may also be used when making plastic repairs.

Technician B says that adhesion promoter may be recommended before applying filler to a plastic part.

Who is right?

• A only

• B only

• Both A and B

• Neither A or B

All of these may be used during a plastic welding repair EXCEPT:

• metal window screen

• nylon window screen

• aluminum body tape

• a filler rod

Technician A says that a plastic fascia containing two ISO codes indicates a blend of two different plastics.

Technician B says that ISO codes are found on the front side of a plastic part.

Who is right?

• A only

• B only

• Both A and B

• Neither A or B