Brazilian Dodge Dart 76 (similar to 69 usa)
I did glued grill pieces in place using C.A. glue ..
Than, yesterday I did some "structural weld" on plastic.. It is my methodology and may vary a lot from work to another work..
what I call structural weld? C.A. glue is weak to grill torsion. We have to melt plastic.. melting two pieces together until they became just one.
I do not weld the entire crack or pieces joint.. I melt small pieces (1/4") along a crack or pieces joint.. for example.. 3 o 4 welds along a 5" crack..
I use a eletronic soldering gun.
I use small pieces of plastic (the same material from the grill) to work as a soldering iron.. I also made small holes at the end of each crack.. I did holes using the soldering gun.
I will take some photos tomorrow.
Next steps.. After structural weld, I will make a V on cracks and pieces joint to put the plastic/acetone mixture. This will completly fill the cracks..
here a youtube examples
[ame="http://www.youtube.com/watch?v=NuA6d49Z7Rc"]YouTube - Plastic Welding with Soldering Iron[/ame]