QuestionI would like to identify the plastic used in the fenders and header panel of my 1984 CRX, and determine the best way to repair cracks and voids. The only stamping inside the header panel that I think might help is the abreviation "ABC", which seems to appear on all headers I have examined. The fenders show no markings. Thanks
AnswerDear Eric,I have never repaired CRX fenders and front panels.
However, when I have to face the problem to deal with pieces that are not known to me,I do this:
first, I determine if such pieces are either thermoplastic or thermosets.with the help of a 40 watts soldering iron,I get the tip of the tool deep inside the material and if the tip gets in easily I try to weld the piece with tiny rods cut off similar discarded parts.
If they are not available I test other materials until I get strong weldings.For plastic fenders try first nylon 66 or <PA+PPE> coplymer. This is used in Land rovers's freelander, Nissan and Renault fenders.Then I proceed by using the procedure explained in past answers for welding and reinforcing.
Front panels are usully thermosets are made of either Polyester+ glass fiber which are repaired in the radiational way. There is plenty of videos in YOUTUBE on how to repair glass fiber. Or, Polyurethane which are not repairable at all.
ABC is not an abbreviation for polymers.
In general, be patient test as suggested in all pieces until you get strong joints. Remember that polymers are made also into blends (copolymers)which can be repaired by either components. you can repair ABS for instance, with of course, ABS, PC or PBT,Very compatible resins.Use no adhesives,glues or cements.Thanks.
